54120245261 has 2 divisors, whose sum is σ = 54120245262. Its totient is φ = 54120245260.

The previous prime is 54120245219. The next prime is 54120245359. The reversal of 54120245261 is 16254202145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51248357161 + 2871888100 = 226381^2 + 53590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54120245261 is a prime.

It is a super-2 number, since 2×54120245261² (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 (54120265261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27060122630 + 27060122631.

It is an arithmetic number, because the mean of its divisors is an integer number (27060122631).

Almost surely, 2^54120245261 is an apocalyptic number.

It is an amenable number.

54120245261 is a deficient number, since it is larger than the sum of its proper divisors (1).

54120245261 is an equidigital number, since it uses as much as digits as its factorization.

54120245261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 54120245261 in words is "fifty-four billion, one hundred twenty million, two hundred forty-five thousand, two hundred sixty-one".