402540572023 has 4 divisors (see below), whose sum is σ = 420042336048. Its totient is φ = 385038808000.

The previous prime is 402540571999. The next prime is 402540572051. The reversal of 402540572023 is 320275045204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402540572023 - 2²⁹ = 402003701111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402540572023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402540572923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8750881978 + ... + 8750882023.

It is an arithmetic number, because the mean of its divisors is an integer number (105010584012).

Almost surely, 2^402540572023 is an apocalyptic number.

402540572023 is a deficient number, since it is larger than the sum of its proper divisors (17501764025).

402540572023 is a wasteful number, since it uses less digits than its factorization.

402540572023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17501764024.

The product of its (nonzero) digits is 67200, while the sum is 34.

The spelling of 402540572023 in words is "four hundred two billion, five hundred forty million, five hundred seventy-two thousand, twenty-three".