67621631156 has 12 divisors (see below), whose sum is σ = 118530905892. Its totient is φ = 33755658048.

The previous prime is 67621631141. The next prime is 67621631177. The reversal of 67621631156 is 65113612676.

It can be written as a sum of positive squares in 2 ways, for example, as 26601610000 + 41020021156 = 163100^2 + 202534^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13786625 + ... + 13791528.

It is an arithmetic number, because the mean of its divisors is an integer number (9877575491).

Almost surely, 2^67621631156 is an apocalyptic number.

It is an amenable number.

67621631156 is a deficient number, since it is larger than the sum of its proper divisors (50909274736).

67621631156 is a wasteful number, since it uses less digits than its factorization.

67621631156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27578770 (or 27578768 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The spelling of 67621631156 in words is "sixty-seven billion, six hundred twenty-one million, six hundred thirty-one thousand, one hundred fifty-six".