64461379715 has 16 divisors (see below), whose sum is σ = 78615592608. Its totient is φ = 50729918976.

The previous prime is 64461379657. The next prime is 64461379721. The reversal of 64461379715 is 51797316446.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64461379715 - 2⁶ = 64461379651 is a prime.

It is a super-2 number, since 2×64461379715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114299 + ... + 376811.

It is an arithmetic number, because the mean of its divisors is an integer number (4913474538).

Almost surely, 2^64461379715 is an apocalyptic number.

64461379715 is a deficient number, since it is larger than the sum of its proper divisors (14154212893).

64461379715 is a wasteful number, since it uses less digits than its factorization.

64461379715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263318.

The product of its digits is 3810240, while the sum is 53.

The spelling of 64461379715 in words is "sixty-four billion, four hundred sixty-one million, three hundred seventy-nine thousand, seven hundred fifteen".