11730861639 has 16 divisors (see below), whose sum is σ = 19861776640. Its totient is φ = 6703349400.

The previous prime is 11730861631. The next prime is 11730861671. The reversal of 11730861639 is 93616803711.

11730861639 is a `hidden beast` number, since 1 + 1 + 7 + 3 + 0 + 8 + 6 + 1 + 639 = 666.

It is not a de Polignac number, because 11730861639 - 2³ = 11730861631 is a prime.

It is a super-2 number, since 2×11730861639² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11730861594 and 11730861603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11730861631) 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, 31033837 + ... + 31034214.

It is an arithmetic number, because the mean of its divisors is an integer number (1241361040).

Almost surely, 2^11730861639 is an apocalyptic number.

11730861639 is a deficient number, since it is larger than the sum of its proper divisors (8130915001).

11730861639 is an equidigital number, since it uses as much as digits as its factorization.

11730861639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62068067 (or 62068061 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 11730861639 in words is "eleven billion, seven hundred thirty million, eight hundred sixty-one thousand, six hundred thirty-nine".