55747461989 has 2 divisors, whose sum is σ = 55747461990. Its totient is φ = 55747461988.

The previous prime is 55747461977. The next prime is 55747462021. The reversal of 55747461989 is 98916474755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43524390625 + 12223071364 = 208625^2 + 110558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55747461989 is a prime.

It is a super-2 number, since 2×55747461989² (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 (55747461389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27873730994 + 27873730995.

It is an arithmetic number, because the mean of its divisors is an integer number (27873730995).

Almost surely, 2^55747461989 is an apocalyptic number.

It is an amenable number.

55747461989 is a deficient number, since it is larger than the sum of its proper divisors (1).

55747461989 is an equidigital number, since it uses as much as digits as its factorization.

55747461989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76204800, while the sum is 65.

The spelling of 55747461989 in words is "fifty-five billion, seven hundred forty-seven million, four hundred sixty-one thousand, nine hundred eighty-nine".