2572391493 has 32 divisors (see below), whose sum is σ = 4365216000. Its totient is φ = 1466615808.

The previous prime is 2572391483. The next prime is 2572391543. The reversal of 2572391493 is 3941932752.

2572391493 is a `hidden beast` number, since 2 + 5 + 72 + 3 + 91 + 493 = 666.

It is not a de Polignac number, because 2572391493 - 2²² = 2568197189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2572391413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69705 + ... + 100017.

It is an arithmetic number, because the mean of its divisors is an integer number (136413000).

Almost surely, 2^2572391493 is an apocalyptic number.

It is an amenable number.

2572391493 is a deficient number, since it is larger than the sum of its proper divisors (1792824507).

2572391493 is a wasteful number, since it uses less digits than its factorization.

2572391493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30778 (or 30772 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 2572391493 is about 50718.7489297597. The cubic root of 2572391493 is about 1370.1844092610.

The spelling of 2572391493 in words is "two billion, five hundred seventy-two million, three hundred ninety-one thousand, four hundred ninety-three".