137265716621 has 8 divisors (see below), whose sum is σ = 153791565024. Its totient is φ = 121414392720.

The previous prime is 137265716603. The next prime is 137265716639. The reversal of 137265716621 is 126617562731.

It is an interprime number because it is at equal distance from previous prime (137265716603) and next prime (137265716639).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137265716621 - 2¹⁸ = 137265454477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137265116621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168630695 + ... + 168631508.

It is an arithmetic number, because the mean of its divisors is an integer number (19223945628).

Almost surely, 2^137265716621 is an apocalyptic number.

137265716621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137265716621 is a deficient number, since it is larger than the sum of its proper divisors (16525848403).

137265716621 is a wasteful number, since it uses less digits than its factorization.

137265716621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337262251.

The product of its digits is 635040, while the sum is 47.

The spelling of 137265716621 in words is "one hundred thirty-seven billion, two hundred sixty-five million, seven hundred sixteen thousand, six hundred twenty-one".