161556015051075 has 24 divisors (see below), whose sum is σ = 267106703452336. Its totient is φ = 86162963328000.

The previous prime is 161556015051023. The next prime is 161556015051089. The reversal of 161556015051075 is 570150510655161.

161556015051075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161556015051075 - 2¹⁶ = 161556014985539 is a prime.

It is a super-2 number, since 2×161556015051075² (a number of 29 digits) contains 22 as substring.

It is a Duffinian 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, 25262895 + ... + 31005255.

Almost surely, 2^{161556015051075} is an apocalyptic number.

161556015051075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161556015051075 is a deficient number, since it is larger than the sum of its proper divisors (105550688401261).

161556015051075 is a wasteful number, since it uses less digits than its factorization.

161556015051075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117495 (or 6117490 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 48.

The spelling of 161556015051075 in words is "one hundred sixty-one trillion, five hundred fifty-six billion, fifteen million, fifty-one thousand, seventy-five".