215654763412 has 72 divisors (see below), whose sum is σ = 419332082400. Its totient is φ = 96962564160.

The previous prime is 215654763397. The next prime is 215654763413. The reversal of 215654763412 is 214367456512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215654763413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34763103 + ... + 34769305.

It is an arithmetic number, because the mean of its divisors is an integer number (5824056700).

Almost surely, 2^215654763412 is an apocalyptic number.

215654763412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215654763412 is a deficient number, since it is larger than the sum of its proper divisors (203677318988).

215654763412 is a wasteful number, since it uses less digits than its factorization.

215654763412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6997 (or 6984 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 215654763412 in words is "two hundred fifteen billion, six hundred fifty-four million, seven hundred sixty-three thousand, four hundred twelve".