878297086722 has 32 divisors (see below), whose sum is σ = 1916319286080. Its totient is φ = 266145808320.

The previous prime is 878297086657. The next prime is 878297086739. The reversal of 878297086722 is 227680792878.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 5560428 + ... + 5716200.

It is an arithmetic number, because the mean of its divisors is an integer number (59884977690).

Almost surely, 2^878297086722 is an apocalyptic number.

878297086722 is an abundant number, since it is smaller than the sum of its proper divisors (1038022199358).

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

878297086722 is a wasteful number, since it uses less digits than its factorization.

878297086722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241218.

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 878297086722 in words is "eight hundred seventy-eight billion, two hundred ninety-seven million, eighty-six thousand, seven hundred twenty-two".