161954652 has 24 divisors (see below), whose sum is σ = 378418432. Its totient is φ = 53910000.

The previous prime is 161954629. The next prime is 161954657. The reversal of 161954652 is 256459161.

It is a super-2 number, since 2×161954652² = 52458618608882208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161954652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161954657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27 + ... + 17997.

Almost surely, 2^161954652 is an apocalyptic number.

161954652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161954652 is an abundant number, since it is smaller than the sum of its proper divisors (216463780).

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

161954652 is a wasteful number, since it uses less digits than its factorization.

161954652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18729 (or 18727 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 161954652 is about 12726.1404989887. The cubic root of 161954652 is about 545.0853071862.

The spelling of 161954652 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, six hundred fifty-two".