161857562080 has 48 divisors (see below), whose sum is σ = 394723615104. Its totient is φ = 62654538240.

The previous prime is 161857562057. The next prime is 161857562101. The reversal of 161857562080 is 80265758161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16311327 + ... + 16321246.

It is an arithmetic number, because the mean of its divisors is an integer number (8223408648).

Almost surely, 2^161857562080 is an apocalyptic number.

161857562080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161857562080 is an abundant number, since it is smaller than the sum of its proper divisors (232866053024).

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

161857562080 is a wasteful number, since it uses less digits than its factorization.

161857562080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32632619 (or 32632611 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 161857562080 in words is "one hundred sixty-one billion, eight hundred fifty-seven million, five hundred sixty-two thousand, eighty".