61687592988 has 48 divisors (see below), whose sum is σ = 164560704000. Its totient is φ = 17618549184.

The previous prime is 61687592977. The next prime is 61687593007. The reversal of 61687592988 is 88929578616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97345 + ... + 364487.

It is an arithmetic number, because the mean of its divisors is an integer number (3428348000).

Almost surely, 2^61687592988 is an apocalyptic number.

It is an amenable number.

61687592988 is an abundant number, since it is smaller than the sum of its proper divisors (102873111012).

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

61687592988 is a wasteful number, since it uses less digits than its factorization.

61687592988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269906 (or 269904 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 69.

The spelling of 61687592988 in words is "sixty-one billion, six hundred eighty-seven million, five hundred ninety-two thousand, nine hundred eighty-eight".