55312732619 has 2 divisors, whose sum is σ = 55312732620. Its totient is φ = 55312732618.

The previous prime is 55312732577. The next prime is 55312732627. The reversal of 55312732619 is 91623721355.

55312732619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55312732619 is a prime.

It is a super-2 number, since 2×55312732619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55312732619.

It is not a weakly prime, because it can be changed into another prime (55312732219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27656366309 + 27656366310.

It is an arithmetic number, because the mean of its divisors is an integer number (27656366310).

Almost surely, 2^55312732619 is an apocalyptic number.

55312732619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55312732619 is an equidigital number, since it uses as much as digits as its factorization.

55312732619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The spelling of 55312732619 in words is "fifty-five billion, three hundred twelve million, seven hundred thirty-two thousand, six hundred nineteen".