12640161832 has 16 divisors (see below), whose sum is σ = 23710471200. Its totient is φ = 6317369520.

The previous prime is 12640161823. The next prime is 12640161839. The reversal of 12640161832 is 23816104621.

It is a super-2 number, since 2×12640161832² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12640161839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319044 + ... + 356467.

It is an arithmetic number, because the mean of its divisors is an integer number (1481904450).

Almost surely, 2^12640161832 is an apocalyptic number.

It is an amenable number.

12640161832 is a deficient number, since it is larger than the sum of its proper divisors (11070309368).

12640161832 is a wasteful number, since it uses less digits than its factorization.

12640161832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677856 (or 677852 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 12640161832 in words is "twelve billion, six hundred forty million, one hundred sixty-one thousand, eight hundred thirty-two".