53397557377 has 2 divisors, whose sum is σ = 53397557378. Its totient is φ = 53397557376.

The previous prime is 53397557363. The next prime is 53397557419. The reversal of 53397557377 is 77375579335.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35247809536 + 18149747841 = 187744^2 + 134721^2 .

It is a cyclic number.

It is not a de Polignac number, because 53397557377 - 2³¹ = 51250073729 is a prime.

It is not a weakly prime, because it can be changed into another prime (53397557077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26698778688 + 26698778689.

It is an arithmetic number, because the mean of its divisors is an integer number (26698778689).

Almost surely, 2^53397557377 is an apocalyptic number.

It is an amenable number.

53397557377 is a deficient number, since it is larger than the sum of its proper divisors (1).

53397557377 is an equidigital number, since it uses as much as digits as its factorization.

53397557377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72930375, while the sum is 61.

The spelling of 53397557377 in words is "fifty-three billion, three hundred ninety-seven million, five hundred fifty-seven thousand, three hundred seventy-seven".