64670448357 has 20 divisors (see below), whose sum is σ = 102289208076. Its totient is φ = 40577535360.

The previous prime is 64670448331. The next prime is 64670448373. The reversal of 64670448357 is 75384407646.

64670448357 is a `hidden beast` number, since 6 + 46 + 70 + 4 + 483 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22714709796 + 41955738561 = 150714^2 + 204831^2 .

It is not a de Polignac number, because 64670448357 - 2⁷ = 64670448229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64670448317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23480994 + ... + 23483747.

Almost surely, 2^64670448357 is an apocalyptic number.

It is an amenable number.

64670448357 is a deficient number, since it is larger than the sum of its proper divisors (37618759719).

64670448357 is a wasteful number, since it uses less digits than its factorization.

64670448357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46964770 (or 46964761 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 64670448357 in words is "sixty-four billion, six hundred seventy million, four hundred forty-eight thousand, three hundred fifty-seven".