40123372493 has 4 divisors (see below), whose sum is σ = 42235128960. Its totient is φ = 38011616028.

The previous prime is 40123372469. The next prime is 40123372507. The reversal of 40123372493 is 39427332104.

40123372493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40123372493 - 2²⁶ = 40056263629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123372193) 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, 1055878205 + ... + 1055878242.

It is an arithmetic number, because the mean of its divisors is an integer number (10558782240).

Almost surely, 2^40123372493 is an apocalyptic number.

It is an amenable number.

40123372493 is a deficient number, since it is larger than the sum of its proper divisors (2111756467).

40123372493 is a wasteful number, since it uses less digits than its factorization.

40123372493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111756466.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 40123372493 in words is "forty billion, one hundred twenty-three million, three hundred seventy-two thousand, four hundred ninety-three".