855149255567880 has 128 divisors (see below), whose sum is σ = 3157474174444800. Its totient is φ = 180427095677952.

The previous prime is 855149255567851. The next prime is 855149255567891. The reversal of 855149255567880 is 88765552941558.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 855149255567796 and 855149255567805.

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, 39155174775 + ... + 39155196614.

It is an arithmetic number, because the mean of its divisors is an integer number (24667766987850).

Almost surely, 2^{855149255567880} is an apocalyptic number.

It is an amenable number.

855149255567880 is an abundant number, since it is smaller than the sum of its proper divisors (2302324918876920).

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

855149255567880 is a wasteful number, since it uses less digits than its factorization.

855149255567880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78310371423 (or 78310371419 counting only the distinct ones).

The product of its (nonzero) digits is 4838400000, while the sum is 78.

The spelling of 855149255567880 in words is "eight hundred fifty-five trillion, one hundred forty-nine billion, two hundred fifty-five million, five hundred sixty-seven thousand, eight hundred eighty".