61563404 has 36 divisors (see below), whose sum is σ = 129659040. Its totient is φ = 25472160.

The previous prime is 61563379. The next prime is 61563421. The reversal of 61563404 is 40436516.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (3601640).

Almost surely, 2^61563404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61563404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64829520).

61563404 is an abundant number, since it is smaller than the sum of its proper divisors (68095636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61563404 is a wasteful number, since it uses less digits than its factorization.

61563404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10878 (or 10869 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 61563404 is about 7846.2350206962. The cubic root of 61563404 is about 394.8579396212.

The spelling of 61563404 in words is "sixty-one million, five hundred sixty-three thousand, four hundred four".