137722508685 has 72 divisors (see below), whose sum is σ = 249679553760. Its totient is φ = 72921158496.

The previous prime is 137722508683. The next prime is 137722508687. The reversal of 137722508685 is 586805227731.

137722508685 is a `hidden beast` number, since 1 + 3 + 7 + 72 + 2 + 508 + 68 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (137722508683) and next prime (137722508687).

It is not a de Polignac number, because 137722508685 - 2¹ = 137722508683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137722508683) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4544794 + ... + 4574996.

It is an arithmetic number, because the mean of its divisors is an integer number (3467771580).

Almost surely, 2^137722508685 is an apocalyptic number.

137722508685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137722508685 is a deficient number, since it is larger than the sum of its proper divisors (111957045075).

137722508685 is an frugal number, since it uses more digits than its factorization.

137722508685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30371 (or 30350 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 137722508685 in words is "one hundred thirty-seven billion, seven hundred twenty-two million, five hundred eight thousand, six hundred eighty-five".