61615522044 has 96 divisors (see below), whose sum is σ = 160549804800. Its totient is φ = 20435163840.

The previous prime is 61615522037. The next prime is 61615522079. The reversal of 61615522044 is 44022551616.

61615522044 is a `hidden beast` number, since 6 + 1 + 61 + 552 + 2 + 0 + 44 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22560159 + ... + 22562889.

It is an arithmetic number, because the mean of its divisors is an integer number (1672393800).

Almost surely, 2^61615522044 is an apocalyptic number.

It is an amenable number.

61615522044 is an abundant number, since it is smaller than the sum of its proper divisors (98934282756).

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

61615522044 is a wasteful number, since it uses less digits than its factorization.

61615522044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720 (or 3712 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 61615522044 in words is "sixty-one billion, six hundred fifteen million, five hundred twenty-two thousand, forty-four".