137621281976 has 32 divisors (see below), whose sum is σ = 276677208000. Its totient is φ = 63943166976.

The previous prime is 137621281949. The next prime is 137621281979. The reversal of 137621281976 is 679182126731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137621281979) 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, 6393821 + ... + 6415308.

It is an arithmetic number, because the mean of its divisors is an integer number (8646162750).

Almost surely, 2^137621281976 is an apocalyptic number.

It is an amenable number.

137621281976 is an abundant number, since it is smaller than the sum of its proper divisors (139055926024).

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

137621281976 is a wasteful number, since it uses less digits than its factorization.

137621281976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12809231 (or 12809227 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 53.

The spelling of 137621281976 in words is "one hundred thirty-seven billion, six hundred twenty-one million, two hundred eighty-one thousand, nine hundred seventy-six".