61502708440 has 32 divisors (see below), whose sum is σ = 138492000000. Its totient is φ = 24581366784.

The previous prime is 61502708437. The next prime is 61502708453. The reversal of 61502708440 is 4480720516.

It is a self number, because there is not a number n which added to its sum of digits gives 61502708440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565560 + ... + 665479.

It is an arithmetic number, because the mean of its divisors is an integer number (4327875000).

Almost surely, 2^61502708440 is an apocalyptic number.

It is an amenable number.

61502708440 is an abundant number, since it is smaller than the sum of its proper divisors (76989291560).

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

61502708440 is a wasteful number, since it uses less digits than its factorization.

61502708440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232299 (or 1232295 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 61502708440 in words is "sixty-one billion, five hundred two million, seven hundred eight thousand, four hundred forty".