10447971640 has 32 divisors (see below), whose sum is σ = 23608849680. Its totient is φ = 4161248512.

The previous prime is 10447971637. The next prime is 10447971641. The reversal of 10447971640 is 4617974401.

It is a super-2 number, since 2×10447971640² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10447971641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551194 + ... + 569833.

Almost surely, 2^10447971640 is an apocalyptic number.

10447971640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10447971640 is an abundant number, since it is smaller than the sum of its proper divisors (13160878040).

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

10447971640 is a wasteful number, since it uses less digits than its factorization.

10447971640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121271 (or 1121267 counting only the distinct ones).

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

The spelling of 10447971640 in words is "ten billion, four hundred forty-seven million, nine hundred seventy-one thousand, six hundred forty".