855515378802 has 32 divisors (see below), whose sum is σ = 1957880937600. Its totient is φ = 244130813568.

The previous prime is 855515378797. The next prime is 855515378803. The reversal of 855515378802 is 208873515558.

It is not an unprimeable number, because it can be changed into a prime (855515378803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12555277 + ... + 12623232.

It is an arithmetic number, because the mean of its divisors is an integer number (61183779300).

Almost surely, 2^855515378802 is an apocalyptic number.

855515378802 is an abundant number, since it is smaller than the sum of its proper divisors (1102365558798).

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

855515378802 is a wasteful number, since it uses less digits than its factorization.

855515378802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25179330.

The product of its (nonzero) digits is 13440000, while the sum is 57.

The spelling of 855515378802 in words is "eight hundred fifty-five billion, five hundred fifteen million, three hundred seventy-eight thousand, eight hundred two".