64035221965 has 64 divisors (see below), whose sum is σ = 91030464000. Its totient is φ = 42631142400.

The previous prime is 64035221963. The next prime is 64035221969. The reversal of 64035221965 is 56912253046.

It is not a de Polignac number, because 64035221965 - 2¹ = 64035221963 is a prime.

It is a super-2 number, since 2×64035221965² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64035221963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59901451 + ... + 59902519.

It is an arithmetic number, because the mean of its divisors is an integer number (1422351000).

Almost surely, 2^64035221965 is an apocalyptic number.

64035221965 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64035221965 is a deficient number, since it is larger than the sum of its proper divisors (26995242035).

64035221965 is a wasteful number, since it uses less digits than its factorization.

64035221965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 64035221965 in words is "sixty-four billion, thirty-five million, two hundred twenty-one thousand, nine hundred sixty-five".