61537480 has 32 divisors (see below), whose sum is σ = 142928640. Its totient is φ = 23820480.

The previous prime is 61537477. The next prime is 61537493. The reversal of 61537480 is 8473516.

It is a super-2 number, since 2×61537480² = 7573722889500800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23574 + ... + 26053.

It is an arithmetic number, because the mean of its divisors is an integer number (4466520).

Almost surely, 2^61537480 is an apocalyptic number.

It is an amenable number.

61537480 is an abundant number, since it is smaller than the sum of its proper divisors (81391160).

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

61537480 is a wasteful number, since it uses less digits than its factorization.

61537480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49669 (or 49665 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 61537480 is about 7844.5828442308. The cubic root of 61537480 is about 394.8025076941.

The spelling of 61537480 in words is "sixty-one million, five hundred thirty-seven thousand, four hundred eighty".