55772044973 has 2 divisors, whose sum is σ = 55772044974. Its totient is φ = 55772044972.

The previous prime is 55772044969. The next prime is 55772045009. The reversal of 55772044973 is 37944027755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41445630724 + 14326414249 = 203582^2 + 119693^2 .

It is a cyclic number.

It is not a de Polignac number, because 55772044973 - 2² = 55772044969 is a prime.

It is a super-2 number, since 2×55772044973² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55772044903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27886022486 + 27886022487.

It is an arithmetic number, because the mean of its divisors is an integer number (27886022487).

Almost surely, 2^55772044973 is an apocalyptic number.

It is an amenable number.

55772044973 is a deficient number, since it is larger than the sum of its proper divisors (1).

55772044973 is an equidigital number, since it uses as much as digits as its factorization.

55772044973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 55772044973 in words is "fifty-five billion, seven hundred seventy-two million, forty-four thousand, nine hundred seventy-three".