4155628621 has 2 divisors, whose sum is σ = 4155628622. Its totient is φ = 4155628620.

The previous prime is 4155628613. The next prime is 4155628637. The reversal of 4155628621 is 1268265514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3594602025 + 561026596 = 59955^2 + 23686^2 .

It is a cyclic number.

It is not a de Polignac number, because 4155628621 - 2³ = 4155628613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4155658621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077814310 + 2077814311.

It is an arithmetic number, because the mean of its divisors is an integer number (2077814311).

Almost surely, 2^4155628621 is an apocalyptic number.

It is an amenable number.

4155628621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155628621 is an equidigital number, since it uses as much as digits as its factorization.

4155628621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 4155628621 is about 64464.1654021829. The cubic root of 4155628621 is about 1607.7267689439.

The spelling of 4155628621 in words is "four billion, one hundred fifty-five million, six hundred twenty-eight thousand, six hundred twenty-one".