64194636 has 24 divisors (see below), whose sum is σ = 163404864. Its totient is φ = 19452880.

The previous prime is 64194629. The next prime is 64194649. The reversal of 64194636 is 63649146.

It is a junction number, because it is equal to n+sod(n) for n = 64194594 and 64194603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243030 + ... + 243293.

It is an arithmetic number, because the mean of its divisors is an integer number (6808536).

Almost surely, 2^64194636 is an apocalyptic number.

64194636 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64194636 is an abundant number, since it is smaller than the sum of its proper divisors (99210228).

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

64194636 is a wasteful number, since it uses less digits than its factorization.

64194636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486341 (or 486339 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 64194636 is about 8012.1555152156. The cubic root of 64194636 is about 400.4050813010.

Subtracting from 64194636 its reverse (63649146), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 64194636 in words is "sixty-four million, one hundred ninety-four thousand, six hundred thirty-six".