11973958692381 has 24 divisors (see below), whose sum is σ = 19767613092864. Its totient is φ = 6841888918560.

The previous prime is 11973958692347. The next prime is 11973958692401. The reversal of 11973958692381 is 18329685937911.

11973958692381 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 3 + 9 + 586 + 9 + 2 + 38 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-11973958692381 is a prime.

It is a super-2 number, since 2×11973958692381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973958692301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4016910 + ... + 6331151.

It is an arithmetic number, because the mean of its divisors is an integer number (823650545536).

Almost surely, 2^{11973958692381} is an apocalyptic number.

It is an amenable number.

11973958692381 is a deficient number, since it is larger than the sum of its proper divisors (7793654400483).

11973958692381 is a wasteful number, since it uses less digits than its factorization.

11973958692381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366441 (or 10366438 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 72.

The spelling of 11973958692381 in words is "eleven trillion, nine hundred seventy-three billion, nine hundred fifty-eight million, six hundred ninety-two thousand, three hundred eighty-one".