169426772564 has 72 divisors (see below), whose sum is σ = 363198144960. Its totient is φ = 68763147264.

The previous prime is 169426772551. The next prime is 169426772687. The reversal of 169426772564 is 465277624961.

It is a super-2 number, since 2×169426772564² (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 23 ways as a sum of consecutive naturals, for example, 11674937 + ... + 11689439.

It is an arithmetic number, because the mean of its divisors is an integer number (5044418680).

Almost surely, 2^169426772564 is an apocalyptic number.

169426772564 is a gapful number since it is divisible by the number (14) 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 169426772564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181599072480).

169426772564 is an abundant number, since it is smaller than the sum of its proper divisors (193771372396).

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

169426772564 is a wasteful number, since it uses less digits than its factorization.

169426772564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17677 (or 17668 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 59.

The spelling of 169426772564 in words is "one hundred sixty-nine billion, four hundred twenty-six million, seven hundred seventy-two thousand, five hundred sixty-four".