11910161551 has 4 divisors (see below), whose sum is σ = 11939863104. Its totient is φ = 11880460000.

The previous prime is 11910161479. The next prime is 11910161621. The reversal of 11910161551 is 15516101911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15516101911 = 4159 ⋅3730729.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11910161551 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11910161251) 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, 14850175 + ... + 14850976.

It is an arithmetic number, because the mean of its divisors is an integer number (2984965776).

Almost surely, 2^11910161551 is an apocalyptic number.

11910161551 is a deficient number, since it is larger than the sum of its proper divisors (29701553).

11910161551 is an equidigital number, since it uses as much as digits as its factorization.

11910161551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29701552.

The product of its (nonzero) digits is 1350, while the sum is 31.

The spelling of 11910161551 in words is "eleven billion, nine hundred ten million, one hundred sixty-one thousand, five hundred fifty-one".