11987415951 has 32 divisors (see below), whose sum is σ = 19398167040. Its totient is φ = 6431975424.

The previous prime is 11987415943. The next prime is 11987415953. The reversal of 11987415951 is 15951478911.

11987415951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11987415951 - 2³ = 11987415943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11987415894 and 11987415903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987415953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87850 + ... + 178023.

It is an arithmetic number, because the mean of its divisors is an integer number (606192720).

Almost surely, 2^11987415951 is an apocalyptic number.

11987415951 is a deficient number, since it is larger than the sum of its proper divisors (7410751089).

11987415951 is a wasteful number, since it uses less digits than its factorization.

11987415951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266015.

The product of its digits is 453600, while the sum is 51.

The spelling of 11987415951 in words is "eleven billion, nine hundred eighty-seven million, four hundred fifteen thousand, nine hundred fifty-one".