137772021715151 has 4 divisors (see below), whose sum is σ = 138108872624400. Its totient is φ = 137435170805904.

The previous prime is 137772021715147. The next prime is 137772021715213. The reversal of 137772021715151 is 151517120277731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137772021715151 - 2² = 137772021715147 is a prime.

It is a super-2 number, since 2×137772021715151² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137772021715151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137772021415151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168425454011 + ... + 168425454828.

It is an arithmetic number, because the mean of its divisors is an integer number (34527218156100).

Almost surely, 2^{137772021715151} is an apocalyptic number.

137772021715151 is a deficient number, since it is larger than the sum of its proper divisors (336850909249).

137772021715151 is an equidigital number, since it uses as much as digits as its factorization.

137772021715151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336850909248.

The product of its (nonzero) digits is 720300, while the sum is 50.

The spelling of 137772021715151 in words is "one hundred thirty-seven trillion, seven hundred seventy-two billion, twenty-one million, seven hundred fifteen thousand, one hundred fifty-one".