145872977391 has 12 divisors (see below), whose sum is σ = 210722273320. Its totient is φ = 97240869360.

The previous prime is 145872977387. The next prime is 145872977399. The reversal of 145872977391 is 193779278541.

145872977391 is a `hidden beast` number, since 1 + 458 + 7 + 2 + 97 + 7 + 3 + 91 = 666.

It is not a de Polignac number, because 145872977391 - 2² = 145872977387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145872977399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528640 + ... + 755781.

Almost surely, 2^145872977391 is an apocalyptic number.

145872977391 is a deficient number, since it is larger than the sum of its proper divisors (64849295929).

145872977391 is a wasteful number, since it uses less digits than its factorization.

145872977391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297046 (or 1297043 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 63.

The spelling of 145872977391 in words is "one hundred forty-five billion, eight hundred seventy-two million, nine hundred seventy-seven thousand, three hundred ninety-one".