161252527455 has 24 divisors (see below), whose sum is σ = 279592330992. Its totient is φ = 85974286464.

The previous prime is 161252527409. The next prime is 161252527463. The reversal of 161252527455 is 554725252161.

161252527455 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 525 + 2 + 74 + 55 = 666.

It is not a de Polignac number, because 161252527455 - 2¹⁶ = 161252461919 is a prime.

It is a super-2 number, since 2×161252527455² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 161252527455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418774 + ... + 705603.

It is an arithmetic number, because the mean of its divisors is an integer number (11649680458).

Almost surely, 2^161252527455 is an apocalyptic number.

161252527455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161252527455 is a deficient number, since it is larger than the sum of its proper divisors (118339803537).

161252527455 is a wasteful number, since it uses less digits than its factorization.

161252527455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127575 (or 1127572 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The spelling of 161252527455 in words is "one hundred sixty-one billion, two hundred fifty-two million, five hundred twenty-seven thousand, four hundred fifty-five".