19516161552 has 40 divisors (see below), whose sum is σ = 52155263040. Its totient is φ = 6281063040.

The previous prime is 19516161547. The next prime is 19516161563. The reversal of 19516161552 is 25516161591.

It is a happy 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, 7008724 + ... + 7011507.

It is an arithmetic number, because the mean of its divisors is an integer number (1303881576).

Almost surely, 2^19516161552 is an apocalyptic number.

19516161552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19516161552 is an abundant number, since it is smaller than the sum of its proper divisors (32639101488).

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

19516161552 is a wasteful number, since it uses less digits than its factorization.

19516161552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020271 (or 14020265 counting only the distinct ones).

The product of its digits is 81000, while the sum is 42.

The spelling of 19516161552 in words is "nineteen billion, five hundred sixteen million, one hundred sixty-one thousand, five hundred fifty-two".