54987863261 has 2 divisors, whose sum is σ = 54987863262. Its totient is φ = 54987863260.

The previous prime is 54987863251. The next prime is 54987863269. The reversal of 54987863261 is 16236878945.

54987863261 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 can be written as a sum of positive squares in only one way, i.e., 38017590361 + 16970272900 = 194981^2 + 130270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54987863261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54987863261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54987863269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27493931630 + 27493931631.

It is an arithmetic number, because the mean of its divisors is an integer number (27493931631).

Almost surely, 2^54987863261 is an apocalyptic number.

It is an amenable number.

54987863261 is a deficient number, since it is larger than the sum of its proper divisors (1).

54987863261 is an equidigital number, since it uses as much as digits as its factorization.

54987863261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The spelling of 54987863261 in words is "fifty-four billion, nine hundred eighty-seven million, eight hundred sixty-three thousand, two hundred sixty-one".