165212330342451 has 32 divisors (see below), whose sum is σ = 260945991720960. Its totient is φ = 91019304943776.

The previous prime is 165212330342429. The next prime is 165212330342471. The reversal of 165212330342451 is 154243033212561.

It is not a de Polignac number, because 165212330342451 - 2¹⁴ = 165212330326067 is a prime.

It is a super-2 number, since 2×165212330342451² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165212330342401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1249100881 + ... + 1249233138.

It is an arithmetic number, because the mean of its divisors is an integer number (8154562241280).

Almost surely, 2^{165212330342451} is an apocalyptic number.

165212330342451 is a deficient number, since it is larger than the sum of its proper divisors (95733661378509).

165212330342451 is a wasteful number, since it uses less digits than its factorization.

165212330342451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498334143.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 165212330342451 in words is "one hundred sixty-five trillion, two hundred twelve billion, three hundred thirty million, three hundred forty-two thousand, four hundred fifty-one".