172371128040776 has 64 divisors (see below), whose sum is σ = 375702512716800. Its totient is φ = 72606681018432.

The previous prime is 172371128040739. The next prime is 172371128040781. The reversal of 172371128040776 is 677040821173271.

It is a super-3 number, since 3×172371128040776³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 11246405 + ... + 21707691.

It is an arithmetic number, because the mean of its divisors is an integer number (5870351761200).

Almost surely, 2^{172371128040776} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172371128040776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187851256358400).

172371128040776 is an abundant number, since it is smaller than the sum of its proper divisors (203331384676024).

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

172371128040776 is a wasteful number, since it uses less digits than its factorization.

172371128040776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10466346 (or 10466342 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 56.

The spelling of 172371128040776 in words is "one hundred seventy-two trillion, three hundred seventy-one billion, one hundred twenty-eight million, forty thousand, seven hundred seventy-six".