64001015 has 16 divisors (see below), whose sum is σ = 83371008. Its totient is φ = 46884096.

The previous prime is 64001011. The next prime is 64001023. The reversal of 64001015 is 51010046.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64001015 - 2² = 64001011 is a prime.

It is a super-2 number, since 2×64001015² = 8192259842060450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64000984 and 64001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64001011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4379 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (5210688).

Almost surely, 2^64001015 is an apocalyptic number.

64001015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64001015 is a deficient number, since it is larger than the sum of its proper divisors (19369993).

64001015 is a wasteful number, since it uses less digits than its factorization.

64001015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7898.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 64001015 is about 8000.0634372485. The cubic root of 64001015 is about 400.0021145722.

The spelling of 64001015 in words is "sixty-four million, one thousand, fifteen".