849172770400 has 72 divisors (see below), whose sum is σ = 2073807439704. Its totient is φ = 339543859200.

The previous prime is 849172770377. The next prime is 849172770421. The reversal of 849172770400 is 4077271948.

It is a happy number.

It is a super-2 number, since 2×849172770400² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1990464 + ... + 2379136.

It is an arithmetic number, because the mean of its divisors is an integer number (28802881107).

Almost surely, 2^849172770400 is an apocalyptic number.

849172770400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

849172770400 is an abundant number, since it is smaller than the sum of its proper divisors (1224634669304).

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

849172770400 is a wasteful number, since it uses less digits than its factorization.

849172770400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391424 (or 391411 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 849172770400 in words is "eight hundred forty-nine billion, one hundred seventy-two million, seven hundred seventy thousand, four hundred".