64151391 has 16 divisors (see below), whose sum is σ = 90391040. Its totient is φ = 40357440.

The previous prime is 64151371. The next prime is 64151401. The reversal of 64151391 is 19315146.

It is not a de Polignac number, because 64151391 - 2¹⁹ = 63627103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64151371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13371 + ... + 17523.

It is an arithmetic number, because the mean of its divisors is an integer number (5649440).

Almost surely, 2^64151391 is an apocalyptic number.

64151391 is a deficient number, since it is larger than the sum of its proper divisors (26239649).

64151391 is a wasteful number, since it uses less digits than its factorization.

64151391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446.

The product of its digits is 3240, while the sum is 30.

The square root of 64151391 is about 8009.4563485920. The cubic root of 64151391 is about 400.3151495534.

The spelling of 64151391 in words is "sixty-four million, one hundred fifty-one thousand, three hundred ninety-one".