61870940916 has 24 divisors (see below), whose sum is σ = 144372664800. Its totient is φ = 20622627552.

The previous prime is 61870940903. The next prime is 61870940959. The reversal of 61870940916 is 61904907816.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149535 + ... + 382233.

It is an arithmetic number, because the mean of its divisors is an integer number (6015527700).

Almost surely, 2^61870940916 is an apocalyptic number.

It is an amenable number.

61870940916 is an abundant number, since it is smaller than the sum of its proper divisors (82501723884).

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

61870940916 is a wasteful number, since it uses less digits than its factorization.

61870940916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254863 (or 254861 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 61870940916 in words is "sixty-one billion, eight hundred seventy million, nine hundred forty thousand, nine hundred sixteen".