11977933801 has 4 divisors (see below), whose sum is σ = 11978152704. Its totient is φ = 11977714900.

The previous prime is 11977933783. The next prime is 11977933837. The reversal of 11977933801 is 10833977911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10833977911 = 15919 ⋅680569.

It is a cyclic number.

It is not a de Polignac number, because 11977933801 - 2⁷ = 11977933673 is a prime.

It is a super-2 number, since 2×11977933801² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11977933861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52836 + ... + 163546.

It is an arithmetic number, because the mean of its divisors is an integer number (2994538176).

Almost surely, 2^11977933801 is an apocalyptic number.

It is an amenable number.

11977933801 is a deficient number, since it is larger than the sum of its proper divisors (218903).

11977933801 is a wasteful number, since it uses less digits than its factorization.

11977933801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218902.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 11977933801 in words is "eleven billion, nine hundred seventy-seven million, nine hundred thirty-three thousand, eight hundred one".