55150605491 has 4 divisors (see below), whose sum is σ = 55156193472. Its totient is φ = 55145017512.

The previous prime is 55150605481. The next prime is 55150605511. The reversal of 55150605491 is 19450605155.

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

It is a cyclic number.

It is not a de Polignac number, because 55150605491 - 2⁶ = 55150605427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55150605401) 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, 2779160 + ... + 2798933.

It is an arithmetic number, because the mean of its divisors is an integer number (13789048368).

Almost surely, 2^55150605491 is an apocalyptic number.

55150605491 is a deficient number, since it is larger than the sum of its proper divisors (5587981).

55150605491 is an equidigital number, since it uses as much as digits as its factorization.

55150605491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587980.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 55150605491 in words is "fifty-five billion, one hundred fifty million, six hundred five thousand, four hundred ninety-one".