2167978651272 has 96 divisors (see below), whose sum is σ = 6712684056000. Its totient is φ = 619212569472.

The previous prime is 2167978651217. The next prime is 2167978651313. The reversal of 2167978651272 is 2721568797612.

2167978651272 is a `hidden beast` number, since 21 + 6 + 7 + 97 + 8 + 6 + 512 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 762979 + ... + 2217677.

It is an arithmetic number, because the mean of its divisors is an integer number (69923792250).

Almost surely, 2^{2167978651272} is an apocalyptic number.

It is an amenable number.

2167978651272 is an abundant number, since it is smaller than the sum of its proper divisors (4544705404728).

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

2167978651272 is a wasteful number, since it uses less digits than its factorization.

2167978651272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457675 (or 1457668 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 2167978651272 in words is "two trillion, one hundred sixty-seven billion, nine hundred seventy-eight million, six hundred fifty-one thousand, two hundred seventy-two".