34720865557 has 24 divisors (see below), whose sum is σ = 40717334400. Its totient is φ = 29519834400.

The previous prime is 34720865549. The next prime is 34720865633. The reversal of 34720865557 is 75556802743.

It is a happy number.

It is not a de Polignac number, because 34720865557 - 2³ = 34720865549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34720865857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5597944 + ... + 5604142.

It is an arithmetic number, because the mean of its divisors is an integer number (1696555600).

Almost surely, 2^34720865557 is an apocalyptic number.

It is an amenable number.

34720865557 is a deficient number, since it is larger than the sum of its proper divisors (5996468843).

34720865557 is a wasteful number, since it uses less digits than its factorization.

34720865557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7121 (or 7114 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 34720865557 in words is "thirty-four billion, seven hundred twenty million, eight hundred sixty-five thousand, five hundred fifty-seven".