11816537607 has 16 divisors (see below), whose sum is σ = 20006836480. Its totient is φ = 6752307096.

The previous prime is 11816537573. The next prime is 11816537653. The reversal of 11816537607 is 70673561811.

11816537607 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 6 + 5 + 37 + 607 = 666.

It is not a de Polignac number, because 11816537607 - 2⁶ = 11816537543 is a prime.

It is a super-2 number, since 2×11816537607² (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 (11816537657) 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, 31260493 + ... + 31260870.

It is an arithmetic number, because the mean of its divisors is an integer number (1250427280).

Almost surely, 2^11816537607 is an apocalyptic number.

11816537607 is a deficient number, since it is larger than the sum of its proper divisors (8190298873).

11816537607 is an equidigital number, since it uses as much as digits as its factorization.

11816537607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62521379 (or 62521373 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 11816537607 in words is "eleven billion, eight hundred sixteen million, five hundred thirty-seven thousand, six hundred seven".