40406126640 has 160 divisors (see below), whose sum is σ = 141054400512. Its totient is φ = 9479424000.

The previous prime is 40406126627. The next prime is 40406126641. The reversal of 40406126640 is 4662160404.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (40406126641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165021 + ... + 328700.

Almost surely, 2^40406126640 is an apocalyptic number.

40406126640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40406126640 is an abundant number, since it is smaller than the sum of its proper divisors (100648273872).

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

40406126640 is a wasteful number, since it uses less digits than its factorization.

40406126640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493779 (or 493773 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 40406126640 in words is "forty billion, four hundred six million, one hundred twenty-six thousand, six hundred forty".