55437644291 has 2 divisors, whose sum is σ = 55437644292. Its totient is φ = 55437644290.

The previous prime is 55437644287. The next prime is 55437644321. The reversal of 55437644291 is 19244673455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55437644291 - 2² = 55437644287 is a prime.

It is not a weakly prime, because it can be changed into another prime (55437644201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27718822145 + 27718822146.

It is an arithmetic number, because the mean of its divisors is an integer number (27718822146).

Almost surely, 2^55437644291 is an apocalyptic number.

55437644291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55437644291 is an equidigital number, since it uses as much as digits as its factorization.

55437644291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 50.

The spelling of 55437644291 in words is "fifty-five billion, four hundred thirty-seven million, six hundred forty-four thousand, two hundred ninety-one".