64157023527881 has 2 divisors, whose sum is σ = 64157023527882. Its totient is φ = 64157023527880.

The previous prime is 64157023527869. The next prime is 64157023527923. The reversal of 64157023527881 is 18872532075146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47030668967881 + 17126354560000 = 6857891^2 + 4138400^2 .

It is a cyclic number.

It is not a de Polignac number, because 64157023527881 - 2³⁰ = 64155949786057 is a prime.

It is a super-2 number, since 2×64157023527881² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64157023527881.

It is not a weakly prime, because it can be changed into another prime (64157023527281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078511763940 + 32078511763941.

It is an arithmetic number, because the mean of its divisors is an integer number (32078511763941).

Almost surely, 2^{64157023527881} is an apocalyptic number.

It is an amenable number.

64157023527881 is a deficient number, since it is larger than the sum of its proper divisors (1).

64157023527881 is an equidigital number, since it uses as much as digits as its factorization.

64157023527881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 64157023527881 in words is "sixty-four trillion, one hundred fifty-seven billion, twenty-three million, five hundred twenty-seven thousand, eight hundred eighty-one".