5551961100911 has 4 divisors (see below), whose sum is σ = 5552018678952. Its totient is φ = 5551903522872.

The previous prime is 5551961100893. The next prime is 5551961100919. The reversal of 5551961100911 is 1190011691555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5551961100911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551961100919) 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, 28644140 + ... + 28837313.

It is an arithmetic number, because the mean of its divisors is an integer number (1388004669738).

Almost surely, 2^{5551961100911} is an apocalyptic number.

5551961100911 is a deficient number, since it is larger than the sum of its proper divisors (57578041).

5551961100911 is an equidigital number, since it uses as much as digits as its factorization.

5551961100911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57578040.

The product of its (nonzero) digits is 60750, while the sum is 44.

The spelling of 5551961100911 in words is "five trillion, five hundred fifty-one billion, nine hundred sixty-one million, one hundred thousand, nine hundred eleven".