161477898632 has 36 divisors (see below), whose sum is σ = 312921205335. Its totient is φ = 78117418320.

The previous prime is 161477898613. The next prime is 161477898713. The reversal of 161477898632 is 236898774161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 80738949316 + 80738949316 = 284146^2 + 284146^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=284146.

It is a super-2 number, since 2×161477898632² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35231813 + ... + 35236395.

Almost surely, 2^161477898632 is an apocalyptic number.

It is an amenable number.

161477898632 is a deficient number, since it is larger than the sum of its proper divisors (151443306703).

161477898632 is an frugal number, since it uses more digits than its factorization.

161477898632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234 (or 4616 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 62.

The spelling of 161477898632 in words is "one hundred sixty-one billion, four hundred seventy-seven million, eight hundred ninety-eight thousand, six hundred thirty-two".