40782975021 has 24 divisors (see below), whose sum is σ = 62477715456. Its totient is φ = 25580190240.

The previous prime is 40782975019. The next prime is 40782975047. The reversal of 40782975021 is 12057928704.

It is a happy number.

It is not a de Polignac number, because 40782975021 - 2¹ = 40782975019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40782975221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1602285 + ... + 1627538.

It is an arithmetic number, because the mean of its divisors is an integer number (2603238144).

Almost surely, 2^40782975021 is an apocalyptic number.

It is an amenable number.

40782975021 is a deficient number, since it is larger than the sum of its proper divisors (21694740435).

40782975021 is a wasteful number, since it uses less digits than its factorization.

40782975021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229913 (or 3229910 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 40782975021 in words is "forty billion, seven hundred eighty-two million, nine hundred seventy-five thousand, twenty-one".