5621615615 has 16 divisors (see below), whose sum is σ = 8410521600. Its totient is φ = 3504383520.

The previous prime is 5621615603. The next prime is 5621615617. The reversal of 5621615615 is 5165161265.

It is a happy number.

It is not a de Polignac number, because 5621615615 - 2¹² = 5621611519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621615617) 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, 7300415 + ... + 7301184.

It is an arithmetic number, because the mean of its divisors is an integer number (525657600).

Almost surely, 2^5621615615 is an apocalyptic number.

5621615615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5621615615 is a deficient number, since it is larger than the sum of its proper divisors (2788905985).

5621615615 is a wasteful number, since it uses less digits than its factorization.

5621615615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14601622.

The product of its digits is 54000, while the sum is 38.

The square root of 5621615615 is about 74977.4340385159. The cubic root of 5621615615 is about 1778.0899022768.

The spelling of 5621615615 in words is "five billion, six hundred twenty-one million, six hundred fifteen thousand, six hundred fifteen".