64676517157 has 4 divisors (see below), whose sum is σ = 73916019616. Its totient is φ = 55437014700.

The previous prime is 64676517097. The next prime is 64676517179. The reversal of 64676517157 is 75171567646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64676517157 - 2¹⁹ = 64675992869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64676517098 and 64676517107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64676557157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619751219 + ... + 4619751232.

It is an arithmetic number, because the mean of its divisors is an integer number (18479004904).

Almost surely, 2^64676517157 is an apocalyptic number.

It is an amenable number.

64676517157 is a deficient number, since it is larger than the sum of its proper divisors (9239502459).

64676517157 is an equidigital number, since it uses as much as digits as its factorization.

64676517157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239502458.

The product of its digits is 7408800, while the sum is 55.

The spelling of 64676517157 in words is "sixty-four billion, six hundred seventy-six million, five hundred seventeen thousand, one hundred fifty-seven".