2064621015 has 32 divisors (see below), whose sum is σ = 3886349760. Its totient is φ = 1036357632.

The previous prime is 2064621007. The next prime is 2064621023. The reversal of 2064621015 is 5101264602.

2064621015 is a `hidden beast` number, since 2 + 0 + 646 + 2 + 1 + 0 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (2064621007) and next prime (2064621023).

It is not a de Polignac number, because 2064621015 - 2³ = 2064621007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2064621015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447514 + ... + 452103.

It is an arithmetic number, because the mean of its divisors is an integer number (121448430).

Almost surely, 2^2064621015 is an apocalyptic number.

2064621015 is a deficient number, since it is larger than the sum of its proper divisors (1821728745).

2064621015 is a wasteful number, since it uses less digits than its factorization.

2064621015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899648 (or 899642 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2064621015 is about 45438.1009176220. The cubic root of 2064621015 is about 1273.3470344200.

Adding to 2064621015 its reverse (5101264602), we get a palindrome (7165885617).

The spelling of 2064621015 in words is "two billion, sixty-four million, six hundred twenty-one thousand, fifteen".