5215691649 has 32 divisors (see below), whose sum is σ = 8107939840. Its totient is φ = 2920914432.

The previous prime is 5215691639. The next prime is 5215691671. The reversal of 5215691649 is 9461965125.

It is not a de Polignac number, because 5215691649 - 2⁴ = 5215691633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5215691598 and 5215691607.

It is not an unprimeable number, because it can be changed into a prime (5215691629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197382 + ... + 222240.

It is an arithmetic number, because the mean of its divisors is an integer number (253373120).

Almost surely, 2^5215691649 is an apocalyptic number.

It is an amenable number.

5215691649 is a deficient number, since it is larger than the sum of its proper divisors (2892248191).

5215691649 is a wasteful number, since it uses less digits than its factorization.

5215691649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25069.

The product of its digits is 583200, while the sum is 48.

The square root of 5215691649 is about 72219.7455617229. The cubic root of 5215691649 is about 1734.2191171293.

The spelling of 5215691649 in words is "five billion, two hundred fifteen million, six hundred ninety-one thousand, six hundred forty-nine".