2581978023 has 12 divisors (see below), whose sum is σ = 3730059840. Its totient is φ = 1721071296.

The previous prime is 2581977973. The next prime is 2581978111. The reversal of 2581978023 is 3208791852.

It is a happy number.

It is not a de Polignac number, because 2581978023 - 2⁹ = 2581977511 is a prime.

It is a super-2 number, since 2×2581978023² = 13333221022509977058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2581978023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581978523) 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, 63583 + ... + 95951.

It is an arithmetic number, because the mean of its divisors is an integer number (310838320).

Almost surely, 2^2581978023 is an apocalyptic number.

2581978023 is a deficient number, since it is larger than the sum of its proper divisors (1148081817).

2581978023 is a wasteful number, since it uses less digits than its factorization.

2581978023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41238 (or 41235 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 2581978023 is about 50813.1678111097. The cubic root of 2581978023 is about 1371.8843877385.

The spelling of 2581978023 in words is "two billion, five hundred eighty-one million, nine hundred seventy-eight thousand, twenty-three".