11867986951 has 2 divisors, whose sum is σ = 11867986952. Its totient is φ = 11867986950.

The previous prime is 11867986927. The next prime is 11867986969. The reversal of 11867986951 is 15968976811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11867986951 - 2⁹ = 11867986439 is a prime.

It is a super-2 number, since 2×11867986951² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11867986951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11867986901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933993475 + 5933993476.

It is an arithmetic number, because the mean of its divisors is an integer number (5933993476).

Almost surely, 2^11867986951 is an apocalyptic number.

11867986951 is a deficient number, since it is larger than the sum of its proper divisors (1).

11867986951 is an equidigital number, since it uses as much as digits as its factorization.

11867986951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 61.

The spelling of 11867986951 in words is "eleven billion, eight hundred sixty-seven million, nine hundred eighty-six thousand, nine hundred fifty-one".