61603956 has 24 divisors (see below), whose sum is σ = 159714240. Its totient is φ = 20534616.

The previous prime is 61603939. The next prime is 61603957. The reversal of 61603956 is 65930616.

61603956 is a `hidden beast` number, since 616 + 0 + 39 + 5 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61603956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61603957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285096 + ... + 285311.

It is an arithmetic number, because the mean of its divisors is an integer number (6654760).

Almost surely, 2^61603956 is an apocalyptic number.

It is an amenable number.

61603956 is an abundant number, since it is smaller than the sum of its proper divisors (98110284).

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

61603956 is a wasteful number, since it uses less digits than its factorization.

61603956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570420 (or 570412 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 61603956 is about 7848.8187646295. The cubic root of 61603956 is about 394.9446186309.

The spelling of 61603956 in words is "sixty-one million, six hundred three thousand, nine hundred fifty-six".