55669777919 has 8 divisors (see below), whose sum is σ = 63640270848. Its totient is φ = 47703701880.

The previous prime is 55669777913. The next prime is 55669777939. The reversal of 55669777919 is 91977796655.

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 55669777919 - 2⁴ = 55669777903 is a prime.

It is a super-2 number, since 2×55669777919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55669777913) 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, 1077167 + ... + 1127664.

It is an arithmetic number, because the mean of its divisors is an integer number (7955033856).

Almost surely, 2^55669777919 is an apocalyptic number.

55669777919 is a deficient number, since it is larger than the sum of its proper divisors (7970492929).

55669777919 is a wasteful number, since it uses less digits than its factorization.

55669777919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208445.

The product of its digits is 225042300, while the sum is 71.

The spelling of 55669777919 in words is "fifty-five billion, six hundred sixty-nine million, seven hundred seventy-seven thousand, nine hundred nineteen".