54125157781 has 2 divisors, whose sum is σ = 54125157782. Its totient is φ = 54125157780.

The previous prime is 54125157743. The next prime is 54125157791. The reversal of 54125157781 is 18775152145.

54125157781 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., 35469695556 + 18655462225 = 188334^2 + 136585^2 .

It is a cyclic number.

It is not a de Polignac number, because 54125157781 - 2²⁷ = 53990940053 is a prime.

It is a super-2 number, since 2×54125157781² (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 (54125157731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27062578890 + 27062578891.

It is an arithmetic number, because the mean of its divisors is an integer number (27062578891).

Almost surely, 2^54125157781 is an apocalyptic number.

It is an amenable number.

54125157781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54125157781 is an equidigital number, since it uses as much as digits as its factorization.

54125157781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392000, while the sum is 46.

The spelling of 54125157781 in words is "fifty-four billion, one hundred twenty-five million, one hundred fifty-seven thousand, seven hundred eighty-one".