61651460 has 48 divisors (see below), whose sum is σ = 141825600. Its totient is φ = 22372224.

The previous prime is 61651459. The next prime is 61651481. The reversal of 61651460 is 6415616.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13331 + ... + 17349.

It is an arithmetic number, because the mean of its divisors is an integer number (2954700).

Almost surely, 2^61651460 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 61651460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70912800).

61651460 is an abundant number, since it is smaller than the sum of its proper divisors (80174140).

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

61651460 is a wasteful number, since it uses less digits than its factorization.

61651460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100 (or 4098 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 61651460 is about 7851.8443693186. The cubic root of 61651460 is about 395.0461090221.

The spelling of 61651460 in words is "sixty-one million, six hundred fifty-one thousand, four hundred sixty".