64896450681870 has 24 divisors (see below), whose sum is σ = 168730771773096. Its totient is φ = 17305720181808.

The previous prime is 64896450681767. The next prime is 64896450681877. The reversal of 64896450681870 is 7818605469846.

64896450681870 is a `hidden beast` number, since 6 + 4 + 8 + 96 + 450 + 6 + 8 + 1 + 87 + 0 = 666.

It is a super-2 number, since 2×64896450681870² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64896450681877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360535837032 + ... + 360535837211.

It is an arithmetic number, because the mean of its divisors is an integer number (7030448823879).

Almost surely, 2^{64896450681870} is an apocalyptic number.

64896450681870 is an abundant number, since it is smaller than the sum of its proper divisors (103834321091226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64896450681870 is a wasteful number, since it uses less digits than its factorization.

64896450681870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721071674256 (or 721071674253 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 72.

The spelling of 64896450681870 in words is "sixty-four trillion, eight hundred ninety-six billion, four hundred fifty million, six hundred eighty-one thousand, eight hundred seventy".