80977025523981 has 4 divisors (see below), whose sum is σ = 107969367365312. Its totient is φ = 53984683682652.

The previous prime is 80977025523967. The next prime is 80977025523983. The reversal of 80977025523981 is 18932552077908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80977025523981 - 2¹¹ = 80977025521933 is a prime.

It is a super-2 number, since 2×80977025523981² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80977025523983) 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, 13496170920661 + ... + 13496170920666.

It is an arithmetic number, because the mean of its divisors is an integer number (26992341841328).

Almost surely, 2^{80977025523981} is an apocalyptic number.

It is an amenable number.

80977025523981 is a deficient number, since it is larger than the sum of its proper divisors (26992341841331).

80977025523981 is a wasteful number, since it uses less digits than its factorization.

80977025523981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26992341841330.

The product of its (nonzero) digits is 76204800, while the sum is 66.

The spelling of 80977025523981 in words is "eighty trillion, nine hundred seventy-seven billion, twenty-five million, five hundred twenty-three thousand, nine hundred eighty-one".