816221954370 has 32 divisors (see below), whose sum is σ = 2062034412480. Its totient is φ = 206203440960.

The previous prime is 816221954369. The next prime is 816221954393. The reversal of 816221954370 is 73459122618.

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, 715983601 + ... + 715984740.

It is an arithmetic number, because the mean of its divisors is an integer number (64438575390).

It is a 1-persistent number, because it is pandigital, but 2⋅816221954370 = 1632443908740 is not.

Almost surely, 2^816221954370 is an apocalyptic number.

816221954370 is an abundant number, since it is smaller than the sum of its proper divisors (1245812458110).

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

816221954370 is a wasteful number, since it uses less digits than its factorization.

816221954370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431968370.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 816221954370 in words is "eight hundred sixteen billion, two hundred twenty-one million, nine hundred fifty-four thousand, three hundred seventy".