137261431020 has 48 divisors (see below), whose sum is σ = 439236580608. Its totient is φ = 31374041280.

The previous prime is 137261431019. The next prime is 137261431031. The reversal of 137261431020 is 20134162731.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163406046 + ... + 163406885.

It is an arithmetic number, because the mean of its divisors is an integer number (9150762096).

Almost surely, 2^137261431020 is an apocalyptic number.

137261431020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137261431020 is an abundant number, since it is smaller than the sum of its proper divisors (301975149588).

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

137261431020 is a wasteful number, since it uses less digits than its factorization.

137261431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326812950 (or 326812948 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 137261431020 its reverse (20134162731), we get a palindrome (157395593751).

The spelling of 137261431020 in words is "one hundred thirty-seven billion, two hundred sixty-one million, four hundred thirty-one thousand, twenty".