161972638248 has 16 divisors (see below), whose sum is σ = 404931595680. Its totient is φ = 53990879408.

The previous prime is 161972638231. The next prime is 161972638249. The reversal of 161972638248 is 842836279161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161972638249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3374429940 + ... + 3374429987.

It is an arithmetic number, because the mean of its divisors is an integer number (25308224730).

Almost surely, 2^161972638248 is an apocalyptic number.

It is an amenable number.

161972638248 is an abundant number, since it is smaller than the sum of its proper divisors (242958957432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161972638248 is a wasteful number, since it uses less digits than its factorization.

161972638248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6748859936 (or 6748859932 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The spelling of 161972638248 in words is "one hundred sixty-one billion, nine hundred seventy-two million, six hundred thirty-eight thousand, two hundred forty-eight".