61504002 has 32 divisors (see below), whose sum is σ = 156201600. Its totient is φ = 17572464.

The previous prime is 61503989. The next prime is 61504039. The reversal of 61504002 is 20040516.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 80977 + ... + 81732.

It is an arithmetic number, because the mean of its divisors is an integer number (4881300).

Almost surely, 2^61504002 is an apocalyptic number.

61504002 is an abundant number, since it is smaller than the sum of its proper divisors (94697598).

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

61504002 is a wasteful number, since it uses less digits than its factorization.

61504002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162727 (or 162721 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 61504002 is about 7842.4487247288. The cubic root of 61504002 is about 394.7309004074.

Adding to 61504002 its reverse (20040516), we get a palindrome (81544518).

The spelling of 61504002 in words is "sixty-one million, five hundred four thousand, two".