137909497508 has 24 divisors (see below), whose sum is σ = 249142736640. Its totient is φ = 66726142560.

The previous prime is 137909497499. The next prime is 137909497543. The reversal of 137909497508 is 805794909731.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870210 + ... + 2917862.

It is an arithmetic number, because the mean of its divisors is an integer number (10380947360).

Almost surely, 2^137909497508 is an apocalyptic number.

It is an amenable number.

137909497508 is a deficient number, since it is larger than the sum of its proper divisors (111233239132).

137909497508 is a wasteful number, since it uses less digits than its factorization.

137909497508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71027 (or 71025 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 137909497508 in words is "one hundred thirty-seven billion, nine hundred nine million, four hundred ninety-seven thousand, five hundred eight".