5155455621 has 16 divisors (see below), whose sum is σ = 6989856768. Its totient is φ = 3379278000.

The previous prime is 5155455593. The next prime is 5155455647. The reversal of 5155455621 is 1265545515.

It is not a de Polignac number, because 5155455621 - 2¹¹ = 5155453573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5155455621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5155455691) 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, 45196 + ... + 111146.

It is an arithmetic number, because the mean of its divisors is an integer number (436866048).

Almost surely, 2^5155455621 is an apocalyptic number.

It is an amenable number.

5155455621 is a deficient number, since it is larger than the sum of its proper divisors (1834401147).

5155455621 is a wasteful number, since it uses less digits than its factorization.

5155455621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66392.

The product of its digits is 150000, while the sum is 39.

The square root of 5155455621 is about 71801.5015232969. The cubic root of 5155455621 is about 1727.5170838337.

The spelling of 5155455621 in words is "five billion, one hundred fifty-five million, four hundred fifty-five thousand, six hundred twenty-one".