161757052254 has 192 divisors, whose sum is σ = 432113909760. Its totient is φ = 42707269440.

The previous prime is 161757052253. The next prime is 161757052267. The reversal of 161757052254 is 452250757161.

161757052254 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 5 + 70 + 522 + 54 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161757052253) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16516099 + ... + 16525889.

It is an arithmetic number, because the mean of its divisors is an integer number (2250593280).

Almost surely, 2^161757052254 is an apocalyptic number.

161757052254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161757052254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216056954880).

161757052254 is an abundant number, since it is smaller than the sum of its proper divisors (270356857506).

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

161757052254 is a wasteful number, since it uses less digits than its factorization.

161757052254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9995 (or 9992 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 161757052254 in words is "one hundred sixty-one billion, seven hundred fifty-seven million, fifty-two thousand, two hundred fifty-four".