55165150191 has 8 divisors (see below), whose sum is σ = 73589195520. Its totient is φ = 36758935832.

The previous prime is 55165150181. The next prime is 55165150277. The reversal of 55165150191 is 19105156155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55165150191 - 2³⁴ = 37985281007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165150121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4450521 + ... + 4462898.

It is an arithmetic number, because the mean of its divisors is an integer number (9198649440).

Almost surely, 2^55165150191 is an apocalyptic number.

55165150191 is a deficient number, since it is larger than the sum of its proper divisors (18424045329).

55165150191 is a wasteful number, since it uses less digits than its factorization.

55165150191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915485.

The product of its (nonzero) digits is 33750, while the sum is 39.

The spelling of 55165150191 in words is "fifty-five billion, one hundred sixty-five million, one hundred fifty thousand, one hundred ninety-one".