61624747872 has 72 divisors (see below), whose sum is σ = 182864760624. Its totient is φ = 19648468224.

The previous prime is 61624747867. The next prime is 61624747889. The reversal of 61624747872 is 27874742616.

61624747872 is a `hidden beast` number, since 6 + 1 + 62 + 47 + 478 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4645003 + ... + 4658250.

It is an arithmetic number, because the mean of its divisors is an integer number (2539788342).

Almost surely, 2^61624747872 is an apocalyptic number.

It is an amenable number.

61624747872 is an abundant number, since it is smaller than the sum of its proper divisors (121240012752).

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

61624747872 is a wasteful number, since it uses less digits than its factorization.

61624747872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9303292 (or 9303281 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The spelling of 61624747872 in words is "sixty-one billion, six hundred twenty-four million, seven hundred forty-seven thousand, eight hundred seventy-two".