161607490000 has 400 divisors, whose sum is σ = 446466335040. Its totient is φ = 56125440000.

The previous prime is 161607489959. The next prime is 161607490043. The reversal of 161607490000 is 94706161.

It is a tau number, because it is divible by the number of its divisors (400).

It is a super-2 number, since 2×161607490000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 240129664 + ... + 240130336.

Almost surely, 2^161607490000 is an apocalyptic number.

161607490000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161607490000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223233167520).

161607490000 is an abundant number, since it is smaller than the sum of its proper divisors (284858845040).

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

161607490000 is a wasteful number, since it uses less digits than its factorization.

161607490000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 161607490000 in words is "one hundred sixty-one billion, six hundred seven million, four hundred ninety thousand".