53420487157 has 2 divisors, whose sum is σ = 53420487158. Its totient is φ = 53420487156.

The previous prime is 53420487143. The next prime is 53420487161. The reversal of 53420487157 is 75178402435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35311671396 + 18108815761 = 187914^2 + 134569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53420487157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53420497157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26710243578 + 26710243579.

It is an arithmetic number, because the mean of its divisors is an integer number (26710243579).

Almost surely, 2^53420487157 is an apocalyptic number.

It is an amenable number.

53420487157 is a deficient number, since it is larger than the sum of its proper divisors (1).

53420487157 is an equidigital number, since it uses as much as digits as its factorization.

53420487157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 53420487157 in words is "fifty-three billion, four hundred twenty million, four hundred eighty-seven thousand, one hundred fifty-seven".