19231461657 has 6 divisors (see below), whose sum is σ = 27778777962. Its totient is φ = 12820974432.

The previous prime is 19231461653. The next prime is 19231461673. The reversal of 19231461657 is 75616413291.

19231461657 is a `hidden beast` number, since 1 + 9 + 23 + 1 + 4 + 616 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10237594761 + 8993866896 = 101181^2 + 94836^2 .

It is not a de Polignac number, because 19231461657 - 2² = 19231461653 is a prime.

It is a super-2 number, since 2×19231461657² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19231461653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1068414528 + ... + 1068414545.

It is an arithmetic number, because the mean of its divisors is an integer number (4629796327).

Almost surely, 2^19231461657 is an apocalyptic number.

It is an amenable number.

19231461657 is a deficient number, since it is larger than the sum of its proper divisors (8547316305).

19231461657 is a wasteful number, since it uses less digits than its factorization.

19231461657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136829079 (or 2136829076 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 19231461657 in words is "nineteen billion, two hundred thirty-one million, four hundred sixty-one thousand, six hundred fifty-seven".