40122890643 has 32 divisors (see below), whose sum is σ = 59648908032. Its totient is φ = 23785904000.

The previous prime is 40122890627. The next prime is 40122890657. The reversal of 40122890643 is 34609822104.

40122890643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40122890643 - 2⁴ = 40122890627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40122890693) 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, 204121 + ... + 349157.

It is an arithmetic number, because the mean of its divisors is an integer number (1864028376).

Almost surely, 2^40122890643 is an apocalyptic number.

40122890643 is a deficient number, since it is larger than the sum of its proper divisors (19526017389).

40122890643 is a wasteful number, since it uses less digits than its factorization.

40122890643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145235.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 40122890643 in words is "forty billion, one hundred twenty-two million, eight hundred ninety thousand, six hundred forty-three".