151921361917 has 18 divisors (see below), whose sum is σ = 173825049818. Its totient is φ = 131965223808.

The previous prime is 151921361909. The next prime is 151921361939. The reversal of 151921361917 is 719163129151.

It can be written as a sum of positive squares in 3 ways, for example, as 34007416921 + 117913944996 = 184411^2 + 343386^2 .

It is not a de Polignac number, because 151921361917 - 2³ = 151921361909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151921341917) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23887584 + ... + 23893942.

Almost surely, 2^151921361917 is an apocalyptic number.

151921361917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

151921361917 is a deficient number, since it is larger than the sum of its proper divisors (21903687901).

151921361917 is an frugal number, since it uses more digits than its factorization.

151921361917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12765 (or 6389 counting only the distinct ones).

The product of its digits is 102060, while the sum is 46.

The spelling of 151921361917 in words is "one hundred fifty-one billion, nine hundred twenty-one million, three hundred sixty-one thousand, nine hundred seventeen".