64121826 has 32 divisors (see below), whose sum is σ = 133705728. Its totient is φ = 20477520.

The previous prime is 64121819. The next prime is 64121831. The reversal of 64121826 is 62812146.

It is a super-2 number, since 2×64121826² = 8223217139148552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64121793 and 64121802.

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, 17485 + ... + 20831.

It is an arithmetic number, because the mean of its divisors is an integer number (4178304).

Almost surely, 2^64121826 is an apocalyptic number.

64121826 is an abundant number, since it is smaller than the sum of its proper divisors (69583902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64121826 is a wasteful number, since it uses less digits than its factorization.

64121826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486.

The product of its digits is 4608, while the sum is 30.

The square root of 64121826 is about 8007.6105050133. The cubic root of 64121826 is about 400.2536432954.

The spelling of 64121826 in words is "sixty-four million, one hundred twenty-one thousand, eight hundred twenty-six".