137621281975 has 12 divisors (see below), whose sum is σ = 171737339704. Its totient is φ = 109395767520.

The previous prime is 137621281949. The next prime is 137621281979. The reversal of 137621281975 is 579182126731.

It is not a de Polignac number, because 137621281975 - 2⁹ = 137621281463 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 17527449 + ... + 17535298.

Almost surely, 2^137621281975 is an apocalyptic number.

137621281975 is a deficient number, since it is larger than the sum of its proper divisors (34116057729).

137621281975 is a wasteful number, since it uses less digits than its factorization.

137621281975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35062914 (or 35062909 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 52.

The spelling of 137621281975 in words is "one hundred thirty-seven billion, six hundred twenty-one million, two hundred eighty-one thousand, nine hundred seventy-five".