55567783457 has 2 divisors, whose sum is σ = 55567783458. Its totient is φ = 55567783456.

The previous prime is 55567783391. The next prime is 55567783463. The reversal of 55567783457 is 75438776555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29178105856 + 26389677601 = 170816^2 + 162449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55567783457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55567783457.

It is not a weakly prime, because it can be changed into another prime (55567783357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27783891728 + 27783891729.

It is an arithmetic number, because the mean of its divisors is an integer number (27783891729).

Almost surely, 2^55567783457 is an apocalyptic number.

It is an amenable number.

55567783457 is a deficient number, since it is larger than the sum of its proper divisors (1).

55567783457 is an equidigital number, since it uses as much as digits as its factorization.

55567783457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480000, while the sum is 62.

The spelling of 55567783457 in words is "fifty-five billion, five hundred sixty-seven million, seven hundred eighty-three thousand, four hundred fifty-seven".