161572068784 has 40 divisors (see below), whose sum is σ = 357929376768. Its totient is φ = 69213691200.

The previous prime is 161572068781. The next prime is 161572068787. The reversal of 161572068784 is 487860275161.

161572068784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161572068781) and next prime (161572068787).

It is a super-2 number, since 2×161572068784² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161572068781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79642 + ... + 574009.

Almost surely, 2^161572068784 is an apocalyptic number.

161572068784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161572068784 is an abundant number, since it is smaller than the sum of its proper divisors (196357307984).

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

161572068784 is a wasteful number, since it uses less digits than its factorization.

161572068784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655873 (or 655867 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 161572068784 in words is "one hundred sixty-one billion, five hundred seventy-two million, sixty-eight thousand, seven hundred eighty-four".