165151656451503 has 24 divisors (see below), whose sum is σ = 247037862895200. Its totient is φ = 106252844218560.

The previous prime is 165151656451459. The next prime is 165151656451517. The reversal of 165151656451503 is 305154656151561.

It is a happy number.

165151656451503 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 5 + 1 + 65 + 64 + 515 + 0 + 3 = 666.

It is not a de Polignac number, because 165151656451503 - 2¹³ = 165151656443311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165151656451503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165151656450503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2837920803 + ... + 2837978996.

It is an arithmetic number, because the mean of its divisors is an integer number (10293244287300).

Almost surely, 2^{165151656451503} is an apocalyptic number.

165151656451503 is a deficient number, since it is larger than the sum of its proper divisors (81886206443697).

165151656451503 is a wasteful number, since it uses less digits than its factorization.

165151656451503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675899919 (or 5675899916 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 54.

The spelling of 165151656451503 in words is "one hundred sixty-five trillion, one hundred fifty-one billion, six hundred fifty-six million, four hundred fifty-one thousand, five hundred three".