64168683274 has 4 divisors (see below), whose sum is σ = 96253024914. Its totient is φ = 32084341636.

The previous prime is 64168683253. The next prime is 64168683283. The reversal of 64168683274 is 47238686146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47238686146 = 2 ⋅23619343073.

It can be written as a sum of positive squares in only one way, i.e., 34352027649 + 29816655625 = 185343^2 + 172675^2 .

It is a super-3 number, since 3×64168683274³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16042170817 + ... + 16042170820.

Almost surely, 2^64168683274 is an apocalyptic number.

64168683274 is a deficient number, since it is larger than the sum of its proper divisors (32084341640).

64168683274 is a wasteful number, since it uses less digits than its factorization.

64168683274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32084341639.

The product of its digits is 9289728, while the sum is 55.

The spelling of 64168683274 in words is "sixty-four billion, one hundred sixty-eight million, six hundred eighty-three thousand, two hundred seventy-four".