123763453721 has 32 divisors (see below), whose sum is σ = 132132695040. Its totient is φ = 115678278144.

The previous prime is 123763453717. The next prime is 123763453741. The reversal of 123763453721 is 127354367321.

It is a cyclic number.

It is not a de Polignac number, because 123763453721 - 2² = 123763453717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123763453711) 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, 172132400 + ... + 172133118.

It is an arithmetic number, because the mean of its divisors is an integer number (4129146720).

Almost surely, 2^123763453721 is an apocalyptic number.

It is an amenable number.

123763453721 is a deficient number, since it is larger than the sum of its proper divisors (8369241319).

123763453721 is a wasteful number, since it uses less digits than its factorization.

123763453721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625.

The product of its digits is 635040, while the sum is 44.

The spelling of 123763453721 in words is "one hundred twenty-three billion, seven hundred sixty-three million, four hundred fifty-three thousand, seven hundred twenty-one".