54862557387721 has 2 divisors, whose sum is σ = 54862557387722. Its totient is φ = 54862557387720.

The previous prime is 54862557387709. The next prime is 54862557387727. The reversal of 54862557387721 is 12778375526845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36140969733696 + 18721587654025 = 6011736^2 + 4326845^2 .

It is a cyclic number.

It is not a de Polignac number, because 54862557387721 - 2¹³ = 54862557379529 is a prime.

It is not a weakly prime, because it can be changed into another prime (54862557387727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27431278693860 + 27431278693861.

It is an arithmetic number, because the mean of its divisors is an integer number (27431278693861).

Almost surely, 2^{54862557387721} is an apocalyptic number.

It is an amenable number.

54862557387721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54862557387721 is an equidigital number, since it uses as much as digits as its factorization.

54862557387721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272000, while the sum is 70.

The spelling of 54862557387721 in words is "fifty-four trillion, eight hundred sixty-two billion, five hundred fifty-seven million, three hundred eighty-seven thousand, seven hundred twenty-one".