2423457981 has 64 divisors (see below), whose sum is σ = 4232908800. Its totient is φ = 1341748800.

The previous prime is 2423457977. The next prime is 2423457983. The reversal of 2423457981 is 1897543242.

2423457981 is a `hidden beast` number, since 2 + 42 + 34 + 579 + 8 + 1 = 666.

It is not a de Polignac number, because 2423457981 - 2² = 2423457977 is a prime.

It is a super-2 number, since 2×2423457981² = 11746297171345192722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2423457983) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 790191 + ... + 793251.

It is an arithmetic number, because the mean of its divisors is an integer number (66139200).

Almost surely, 2^2423457981 is an apocalyptic number.

2423457981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2423457981 is a deficient number, since it is larger than the sum of its proper divisors (1809450819).

2423457981 is a wasteful number, since it uses less digits than its factorization.

2423457981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3201 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2423457981 is about 49228.6296884242. The cubic root of 2423457981 is about 1343.2138608488.

It can be divided in two parts, 24234 and 57981, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 2423457981 in words is "two billion, four hundred twenty-three million, four hundred fifty-seven thousand, nine hundred eighty-one".