78557583053 has 2 divisors, whose sum is σ = 78557583054. Its totient is φ = 78557583052.

The previous prime is 78557583031. The next prime is 78557583061. The reversal of 78557583053 is 35038575587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43721973604 + 34835609449 = 209098^2 + 186643^2 .

It is a cyclic number.

It is not a de Polignac number, because 78557583053 - 2¹⁴ = 78557566669 is a prime.

It is a super-3 number, since 3×78557583053³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78557583053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78557513053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39278791526 + 39278791527.

It is an arithmetic number, because the mean of its divisors is an integer number (39278791527).

Almost surely, 2^78557583053 is an apocalyptic number.

It is an amenable number.

78557583053 is a deficient number, since it is larger than the sum of its proper divisors (1).

78557583053 is an equidigital number, since it uses as much as digits as its factorization.

78557583053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640000, while the sum is 56.

The spelling of 78557583053 in words is "seventy-eight billion, five hundred fifty-seven million, five hundred eighty-three thousand, fifty-three".