10631785399 has 6 divisors (see below), whose sum is σ = 10897423640. Its totient is φ = 10372471920.

The previous prime is 10631785391. The next prime is 10631785421. The reversal of 10631785399 is 99358713601.

It is a happy number.

It is not a de Polignac number, because 10631785399 - 2³ = 10631785391 is a prime.

It is a super-2 number, since 2×10631785399² (a number of 21 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 (10631785391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3160659 + ... + 3164020.

Almost surely, 2^10631785399 is an apocalyptic number.

10631785399 is a deficient number, since it is larger than the sum of its proper divisors (265638241).

10631785399 is an frugal number, since it uses more digits than its factorization.

10631785399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324761 (or 6324720 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 10631785399 in words is "ten billion, six hundred thirty-one million, seven hundred eighty-five thousand, three hundred ninety-nine".