40640146620 has 48 divisors (see below), whose sum is σ = 120486084768. Its totient is φ = 10199879680.

The previous prime is 40640146619. The next prime is 40640146621. The reversal of 40640146620 is 2664104604.

It is an interprime number because it is at equal distance from previous prime (40640146619) and next prime (40640146621).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640146621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19920621 + ... + 19922660.

It is an arithmetic number, because the mean of its divisors is an integer number (2510126766).

Almost surely, 2^40640146620 is an apocalyptic number.

It is an amenable number.

40640146620 is an abundant number, since it is smaller than the sum of its proper divisors (79845938148).

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

40640146620 is a wasteful number, since it uses less digits than its factorization.

40640146620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39843310 (or 39843308 counting only the distinct ones).

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

The spelling of 40640146620 in words is "forty billion, six hundred forty million, one hundred forty-six thousand, six hundred twenty".