137564195238 has 80 divisors (see below), whose sum is σ = 324966312000. Its totient is φ = 43374765168.

The previous prime is 137564195221. The next prime is 137564195303. The reversal of 137564195238 is 832591465731.

It is a happy number.

137564195238 is a `hidden beast` number, since 1 + 3 + 75 + 6 + 41 + 9 + 523 + 8 = 666.

It is a super-2 number, since 2×137564195238² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1994493 + ... + 2062311.

It is an arithmetic number, because the mean of its divisors is an integer number (4062078900).

Almost surely, 2^137564195238 is an apocalyptic number.

137564195238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 137564195238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162483156000).

137564195238 is an abundant number, since it is smaller than the sum of its proper divisors (187402116762).

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

137564195238 is a wasteful number, since it uses less digits than its factorization.

137564195238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68511 (or 68502 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 137564195238 in words is "one hundred thirty-seven billion, five hundred sixty-four million, one hundred ninety-five thousand, two hundred thirty-eight".