54620215261 has 2 divisors, whose sum is σ = 54620215262. Its totient is φ = 54620215260.

The previous prime is 54620215201. The next prime is 54620215313. The reversal of 54620215261 is 16251202645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37510005625 + 17110209636 = 193675^2 + 130806^2 .

It is a cyclic number.

It is not a de Polignac number, because 54620215261 - 2³¹ = 52472731613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54620215201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27310107630 + 27310107631.

It is an arithmetic number, because the mean of its divisors is an integer number (27310107631).

Almost surely, 2^54620215261 is an apocalyptic number.

It is an amenable number.

54620215261 is a deficient number, since it is larger than the sum of its proper divisors (1).

54620215261 is an equidigital number, since it uses as much as digits as its factorization.

54620215261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 54620215261 in words is "fifty-four billion, six hundred twenty million, two hundred fifteen thousand, two hundred sixty-one".