64879745 has 16 divisors (see below), whose sum is σ = 91849728. Its totient is φ = 43053120.

The previous prime is 64879739. The next prime is 64879747. The reversal of 64879745 is 54797846.

It is not a de Polignac number, because 64879745 - 2⁸ = 64879489 is a prime.

It is a super-2 number, since 2×64879745² = 8418762622530050, 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 = 64879693 and 64879702.

It is not an unprimeable number, because it can be changed into a prime (64879747) 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, 28814 + ... + 30983.

It is an arithmetic number, because the mean of its divisors is an integer number (5740608).

Almost surely, 2^64879745 is an apocalyptic number.

It is an amenable number.

64879745 is a deficient number, since it is larger than the sum of its proper divisors (26969983).

64879745 is a wasteful number, since it uses less digits than its factorization.

64879745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59840.

The product of its digits is 1693440, while the sum is 50.

The square root of 64879745 is about 8054.7963971785. The cubic root of 64879745 is about 401.8244677249.

The spelling of 64879745 in words is "sixty-four million, eight hundred seventy-nine thousand, seven hundred forty-five".