2151131662409 has 4 divisors (see below), whose sum is σ = 2244659126016. Its totient is φ = 2057604198804.

The previous prime is 2151131662373. The next prime is 2151131662429. The reversal of 2151131662409 is 9042661311512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2151131662409 - 2⁸ = 2151131662153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151131662429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46763731769 + ... + 46763731814.

It is an arithmetic number, because the mean of its divisors is an integer number (561164781504).

Almost surely, 2^{2151131662409} is an apocalyptic number.

It is an amenable number.

2151131662409 is a deficient number, since it is larger than the sum of its proper divisors (93527463607).

2151131662409 is an equidigital number, since it uses as much as digits as its factorization.

2151131662409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93527463606.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 2151131662409 in words is "two trillion, one hundred fifty-one billion, one hundred thirty-one million, six hundred sixty-two thousand, four hundred nine".