137235425208 has 128 divisors (see below), whose sum is σ = 401168056320. Its totient is φ = 38306459520.

The previous prime is 137235425167. The next prime is 137235425219. The reversal of 137235425208 is 802524532731.

It is a Cunningham number, because it is equal to 370453²-1.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 137235425208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4430013 + ... + 4460883.

It is an arithmetic number, because the mean of its divisors is an integer number (3134125440).

Almost surely, 2^137235425208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137235425208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200584028160).

137235425208 is an abundant number, since it is smaller than the sum of its proper divisors (263932631112).

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

137235425208 is a wasteful number, since it uses less digits than its factorization.

137235425208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31497 (or 31493 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

Adding to 137235425208 its reverse (802524532731), we get a palindrome (939759957939).

The spelling of 137235425208 in words is "one hundred thirty-seven billion, two hundred thirty-five million, four hundred twenty-five thousand, two hundred eight".