40640294475 has 72 divisors (see below), whose sum is σ = 82861339392. Its totient is φ = 18847646400.

The previous prime is 40640294419. The next prime is 40640294603. The reversal of 40640294475 is 57449204604.

It is not a de Polignac number, because 40640294475 - 2⁶ = 40640294411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40640294475.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 300039 + ... + 413888.

It is an arithmetic number, because the mean of its divisors is an integer number (1150851936).

Almost surely, 2^40640294475 is an apocalyptic number.

40640294475 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40640294475 is an abundant number, since it is smaller than the sum of its proper divisors (42221044917).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40640294475 is a wasteful number, since it uses less digits than its factorization.

40640294475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713977 (or 713969 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 40640294475 in words is "forty billion, six hundred forty million, two hundred ninety-four thousand, four hundred seventy-five".