40990517643 has 18 divisors (see below), whose sum is σ = 56039217276. Its totient is φ = 26651148000.

The previous prime is 40990517627. The next prime is 40990517669. The reversal of 40990517643 is 34671509904.

40990517643 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 40990517643 - 2⁴ = 40990517627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40990517592 and 40990517601.

It is not an unprimeable number, because it can be changed into a prime (40990512643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14376168 + ... + 14379018.

Almost surely, 2^40990517643 is an apocalyptic number.

40990517643 is a deficient number, since it is larger than the sum of its proper divisors (15048699633).

40990517643 is an frugal number, since it uses more digits than its factorization.

40990517643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

Multiplying 40990517643 by its sum of digits (48), we get a square (1967544846864 = 1402692²).

The spelling of 40990517643 in words is "forty billion, nine hundred ninety million, five hundred seventeen thousand, six hundred forty-three".