61404736 has 14 divisors (see below), whose sum is σ = 121850150. Its totient is φ = 30702336.

The previous prime is 61404709. The next prime is 61404767. The reversal of 61404736 is 63740416.

It can be written as a sum of positive squares in only one way, i.e., 59598400 + 1806336 = 7720^2 + 1344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61404698 and 61404707.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479661 + ... + 479788.

Almost surely, 2^61404736 is an apocalyptic number.

It is an amenable number.

61404736 is a deficient number, since it is larger than the sum of its proper divisors (60445414).

61404736 is an equidigital number, since it uses as much as digits as its factorization.

61404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959461 (or 959451 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 61404736 is about 7836.1174059607. The cubic root of 61404736 is about 394.5184239531.

The spelling of 61404736 in words is "sixty-one million, four hundred four thousand, seven hundred thirty-six".