161764287477 has 24 divisors (see below), whose sum is σ = 236367127584. Its totient is φ = 98347863744.

The previous prime is 161764287467. The next prime is 161764287521. The reversal of 161764287477 is 774782467161.

It is not a de Polignac number, because 161764287477 - 2¹⁴ = 161764271093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161764287477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161764287467) 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, 1879978 + ... + 1964139.

It is an arithmetic number, because the mean of its divisors is an integer number (9848630316).

Almost surely, 2^161764287477 is an apocalyptic number.

It is an amenable number.

161764287477 is a deficient number, since it is larger than the sum of its proper divisors (74602840107).

161764287477 is a wasteful number, since it uses less digits than its factorization.

161764287477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844229 (or 3844216 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 60.

The spelling of 161764287477 in words is "one hundred sixty-one billion, seven hundred sixty-four million, two hundred eighty-seven thousand, four hundred seventy-seven".