161649326140896 has 96 divisors (see below), whose sum is σ = 463197315829248. Its totient is φ = 48953699594240.

The previous prime is 161649326140879. The next prime is 161649326140927. The reversal of 161649326140896 is 698041623946161.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×161649326140896² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46678641 + ... + 50021936.

It is an arithmetic number, because the mean of its divisors is an integer number (4824972039888).

Almost surely, 2^{161649326140896} is an apocalyptic number.

161649326140896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161649326140896 is an abundant number, since it is smaller than the sum of its proper divisors (301547989688352).

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

161649326140896 is a wasteful number, since it uses less digits than its factorization.

161649326140896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96702184 (or 96702176 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 66.

The spelling of 161649326140896 in words is "one hundred sixty-one trillion, six hundred forty-nine billion, three hundred twenty-six million, one hundred forty thousand, eight hundred ninety-six".