55158332069 has 4 divisors (see below), whose sum is σ = 55401320544. Its totient is φ = 54915343596.

The previous prime is 55158332059. The next prime is 55158332077. The reversal of 55158332069 is 96023385155.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55158332069 is a prime.

It is a super-2 number, since 2×55158332069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55158332059) 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, 121493897 + ... + 121494350.

It is an arithmetic number, because the mean of its divisors is an integer number (13850330136).

Almost surely, 2^55158332069 is an apocalyptic number.

It is an amenable number.

55158332069 is a deficient number, since it is larger than the sum of its proper divisors (242988475).

55158332069 is a wasteful number, since it uses less digits than its factorization.

55158332069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242988474.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 55158332069 in words is "fifty-five billion, one hundred fifty-eight million, three hundred thirty-two thousand, sixty-nine".