161647201512 has 48 divisors (see below), whose sum is σ = 460836324000. Its totient is φ = 51046484256.

The previous prime is 161647201501. The next prime is 161647201519. The reversal of 161647201512 is 215102746161.

161647201512 is a `hidden beast` number, since 1 + 6 + 1 + 647 + 2 + 0 + 1 + 5 + 1 + 2 = 666.

It is a super-2 number, since 2×161647201512² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161647201519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59080212 + ... + 59082947.

It is an arithmetic number, because the mean of its divisors is an integer number (9600756750).

Almost surely, 2^161647201512 is an apocalyptic number.

161647201512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161647201512 is an abundant number, since it is smaller than the sum of its proper divisors (299189122488).

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

161647201512 is a wasteful number, since it uses less digits than its factorization.

161647201512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118163190 (or 118163183 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 161647201512 its reverse (215102746161), we get a palindrome (376749947673).

The spelling of 161647201512 in words is "one hundred sixty-one billion, six hundred forty-seven million, two hundred one thousand, five hundred twelve".