64274321690 has 8 divisors (see below), whose sum is σ = 115693779060. Its totient is φ = 25709728672.

The previous prime is 64274321689. The next prime is 64274321693. The reversal of 64274321690 is 9612347246.

64274321690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55031998921 + 9242322769 = 234589^2 + 96137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64274321690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64274321693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3213716075 + ... + 3213716094.

Almost surely, 2^64274321690 is an apocalyptic number.

64274321690 is a deficient number, since it is larger than the sum of its proper divisors (51419457370).

64274321690 is a wasteful number, since it uses less digits than its factorization.

64274321690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427432176.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 64274321690 in words is "sixty-four billion, two hundred seventy-four million, three hundred twenty-one thousand, six hundred ninety".