11971692971455 has 16 divisors (see below), whose sum is σ = 17384105424960. Its totient is φ = 7726269076992.

The previous prime is 11971692971443. The next prime is 11971692971473. The reversal of 11971692971455 is 55417929617911.

11971692971455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11971692971455 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10060245600 + ... + 10060246789.

It is an arithmetic number, because the mean of its divisors is an integer number (1086506589060).

Almost surely, 2^{11971692971455} is an apocalyptic number.

11971692971455 is a deficient number, since it is larger than the sum of its proper divisors (5412412453505).

11971692971455 is a wasteful number, since it uses less digits than its factorization.

11971692971455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20120492418.

The product of its digits is 42865200, while the sum is 67.

The spelling of 11971692971455 in words is "eleven trillion, nine hundred seventy-one billion, six hundred ninety-two million, nine hundred seventy-one thousand, four hundred fifty-five".