40202197797 has 12 divisors (see below), whose sum is σ = 54526867520. Its totient is φ = 26347196232.

The previous prime is 40202197753. The next prime is 40202197813. The reversal of 40202197797 is 79779120204.

It is not a de Polignac number, because 40202197797 - 2¹² = 40202193701 is a prime.

It is a super-2 number, since 2×40202197797² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40202197747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1914397 + ... + 1935282.

Almost surely, 2^40202197797 is an apocalyptic number.

It is an amenable number.

40202197797 is a deficient number, since it is larger than the sum of its proper divisors (14324669723).

40202197797 is an equidigital number, since it uses as much as digits as its factorization.

40202197797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849800 (or 3849741 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 48.

The spelling of 40202197797 in words is "forty billion, two hundred two million, one hundred ninety-seven thousand, seven hundred ninety-seven".