161527403421 has 64 divisors (see below), whose sum is σ = 247642583040. Its totient is φ = 103999371840.

The previous prime is 161527403419. The next prime is 161527403437. The reversal of 161527403421 is 124304725161.

161527403421 is a `hidden beast` number, since 1 + 61 + 527 + 40 + 34 + 2 + 1 = 666.

It is not a de Polignac number, because 161527403421 - 2¹ = 161527403419 is a prime.

It is a super-2 number, since 2×161527403421² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161527401421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118161280 + ... + 118162646.

It is an arithmetic number, because the mean of its divisors is an integer number (3869415360).

Almost surely, 2^161527403421 is an apocalyptic number.

It is an amenable number.

161527403421 is a deficient number, since it is larger than the sum of its proper divisors (86115179619).

161527403421 is a wasteful number, since it uses less digits than its factorization.

161527403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2657 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 161527403421 in words is "one hundred sixty-one billion, five hundred twenty-seven million, four hundred three thousand, four hundred twenty-one".