61207956 has 72 divisors (see below), whose sum is σ = 165582144. Its totient is φ = 18996480.

The previous prime is 61207933. The next prime is 61207961. The reversal of 61207956 is 65970216.

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 61207956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62551 + ... + 63521.

It is an arithmetic number, because the mean of its divisors is an integer number (2299752).

Almost surely, 2^61207956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61207956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82791072).

61207956 is an abundant number, since it is smaller than the sum of its proper divisors (104374188).

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

61207956 is a wasteful number, since it uses less digits than its factorization.

61207956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 61207956 is about 7823.5513675057. The cubic root of 61207956 is about 394.0965432892.

The spelling of 61207956 in words is "sixty-one million, two hundred seven thousand, nine hundred fifty-six".