145557798827 has 24 divisors (see below), whose sum is σ = 180793172736. Its totient is φ = 116563941648.

The previous prime is 145557798817. The next prime is 145557798863. The reversal of 145557798827 is 728897755541.

It is a de Polignac number, because none of the positive numbers 2^k-145557798827 is a prime.

It is a super-2 number, since 2×145557798827² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145557798817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1453343 + ... + 1550264.

It is an arithmetic number, because the mean of its divisors is an integer number (7533048864).

Almost surely, 2^145557798827 is an apocalyptic number.

145557798827 is a deficient number, since it is larger than the sum of its proper divisors (35235373909).

145557798827 is a wasteful number, since it uses less digits than its factorization.

145557798827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003687 (or 3003680 counting only the distinct ones).

The product of its digits is 197568000, while the sum is 68.

The spelling of 145557798827 in words is "one hundred forty-five billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, eight hundred twenty-seven".