61601504 has 12 divisors (see below), whose sum is σ = 121278024. Its totient is φ = 30800736.

The previous prime is 61601497. The next prime is 61601509. The reversal of 61601504 is 40510616.

It is a self number, because there is not a number n which added to its sum of digits gives 61601504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61601509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962492 + ... + 962555.

It is an arithmetic number, because the mean of its divisors is an integer number (10106502).

Almost surely, 2^61601504 is an apocalyptic number.

It is an amenable number.

61601504 is a deficient number, since it is larger than the sum of its proper divisors (59676520).

61601504 is a wasteful number, since it uses less digits than its factorization.

61601504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925057 (or 1925049 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61601504 is about 7848.6625612266. The cubic root of 61601504 is about 394.9393786154.

The spelling of 61601504 in words is "sixty-one million, six hundred one thousand, five hundred four".