40157947493 has 2 divisors, whose sum is σ = 40157947494. Its totient is φ = 40157947492.

The previous prime is 40157947481. The next prime is 40157947601. The reversal of 40157947493 is 39474975104.

40157947493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36380984644 + 3776962849 = 190738^2 + 61457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40157947493 is a prime.

It is a super-2 number, since 2×40157947493² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40157941493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078973746 + 20078973747.

It is an arithmetic number, because the mean of its divisors is an integer number (20078973747).

Almost surely, 2^40157947493 is an apocalyptic number.

It is an amenable number.

40157947493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157947493 is an equidigital number, since it uses as much as digits as its factorization.

40157947493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 40157947493 in words is "forty billion, one hundred fifty-seven million, nine hundred forty-seven thousand, four hundred ninety-three".