207621471904 has 144 divisors (see below), whose sum is σ = 519050379456. Its totient is φ = 80839449600.

The previous prime is 207621471901. The next prime is 207621471917. The reversal of 207621471904 is 409174126702.

It is a super-2 number, since 2×207621471904² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (207621471901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37132149 + ... + 37137739.

It is an arithmetic number, because the mean of its divisors is an integer number (3604516524).

Almost surely, 2^207621471904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 207621471904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259525189728).

207621471904 is an abundant number, since it is smaller than the sum of its proper divisors (311428907552).

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

207621471904 is a wasteful number, since it uses less digits than its factorization.

207621471904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779 (or 7764 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 207621471904 in words is "two hundred seven billion, six hundred twenty-one million, four hundred seventy-one thousand, nine hundred four".