158440594772 has 12 divisors (see below), whose sum is σ = 277344789876. Its totient is φ = 79199226240.

The previous prime is 158440594757. The next prime is 158440594777. The reversal of 158440594772 is 277495044851.

It can be written as a sum of positive squares in 2 ways, for example, as 121101216016 + 37339378756 = 347996^2 + 193234^2 .

It is a super-2 number, since 2×158440594772² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158440594777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250863 + ... + 5280950.

It is an arithmetic number, because the mean of its divisors is an integer number (23112065823).

Almost surely, 2^158440594772 is an apocalyptic number.

It is an amenable number.

158440594772 is a deficient number, since it is larger than the sum of its proper divisors (118904195104).

158440594772 is a wasteful number, since it uses less digits than its factorization.

158440594772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535578 (or 10535576 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 158440594772 in words is "one hundred fifty-eight billion, four hundred forty million, five hundred ninety-four thousand, seven hundred seventy-two".