905723972491 has 16 divisors (see below), whose sum is σ = 977512375840. Its totient is φ = 834239658240.

The previous prime is 905723972443. The next prime is 905723972533. The reversal of 905723972491 is 194279327509.

905723972491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 905723972491 - 2²⁷ = 905589754763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (905723972441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13918711 + ... + 13983631.

It is an arithmetic number, because the mean of its divisors is an integer number (61094523490).

Almost surely, 2^905723972491 is an apocalyptic number.

905723972491 is a deficient number, since it is larger than the sum of its proper divisors (71788403349).

905723972491 is a wasteful number, since it uses less digits than its factorization.

905723972491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67246.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 905723972491 in words is "nine hundred five billion, seven hundred twenty-three million, nine hundred seventy-two thousand, four hundred ninety-one".