64195851 has 32 divisors (see below), whose sum is σ = 94240000. Its totient is φ = 38724480.

The previous prime is 64195847. The next prime is 64195891. The reversal of 64195851 is 15859146.

It is not a de Polignac number, because 64195851 - 2² = 64195847 is a prime.

It is a super-2 number, since 2×64195851² = 8242214571228402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64195841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128400 + ... + 128898.

It is an arithmetic number, because the mean of its divisors is an integer number (2945000).

Almost surely, 2^64195851 is an apocalyptic number.

64195851 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

64195851 is a deficient number, since it is larger than the sum of its proper divisors (30044149).

64195851 is a wasteful number, since it uses less digits than its factorization.

64195851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 43200, while the sum is 39.

The square root of 64195851 is about 8012.2313371495. The cubic root of 64195851 is about 400.4076074161.

The spelling of 64195851 in words is "sixty-four million, one hundred ninety-five thousand, eight hundred fifty-one".