721463150691 has 64 divisors (see below), whose sum is σ = 1142152704000. Its totient is φ = 449096901120.

The previous prime is 721463150689. The next prime is 721463150729. The reversal of 721463150691 is 196051364127.

721463150691 is a `hidden beast` number, since 7 + 2 + 1 + 4 + 631 + 5 + 0 + 6 + 9 + 1 = 666.

721463150691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 721463150691 - 2¹ = 721463150689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721463150621) 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, 37686400 + ... + 37705538.

It is an arithmetic number, because the mean of its divisors is an integer number (17846136000).

Almost surely, 2^721463150691 is an apocalyptic number.

721463150691 is a deficient number, since it is larger than the sum of its proper divisors (420689553309).

721463150691 is a wasteful number, since it uses less digits than its factorization.

721463150691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20761 (or 20755 counting only the distinct ones).

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

The spelling of 721463150691 in words is "seven hundred twenty-one billion, four hundred sixty-three million, one hundred fifty thousand, six hundred ninety-one".