64505553157 has 2 divisors, whose sum is σ = 64505553158. Its totient is φ = 64505553156.

The previous prime is 64505553127. The next prime is 64505553181. The reversal of 64505553157 is 75135550546.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36800283556 + 27705269601 = 191834^2 + 166449^2 .

It is a cyclic number.

It is not a de Polignac number, because 64505553157 - 2⁷ = 64505553029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64505553127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32252776578 + 32252776579.

It is an arithmetic number, because the mean of its divisors is an integer number (32252776579).

Almost surely, 2^64505553157 is an apocalyptic number.

It is an amenable number.

64505553157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64505553157 is an equidigital number, since it uses as much as digits as its factorization.

64505553157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575000, while the sum is 46.

The spelling of 64505553157 in words is "sixty-four billion, five hundred five million, five hundred fifty-three thousand, one hundred fifty-seven".