6415372561 has 16 divisors (see below), whose sum is σ = 7018654720. Its totient is φ = 5828500800.

The previous prime is 6415372519. The next prime is 6415372567. The reversal of 6415372561 is 1652735146.

6415372561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6415372561 - 2¹¹ = 6415370513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6415372567) 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, 198976 + ... + 228958.

It is an arithmetic number, because the mean of its divisors is an integer number (438665920).

Almost surely, 2^6415372561 is an apocalyptic number.

It is an amenable number.

6415372561 is a deficient number, since it is larger than the sum of its proper divisors (603282159).

6415372561 is a wasteful number, since it uses less digits than its factorization.

6415372561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30256.

The product of its digits is 151200, while the sum is 40.

The square root of 6415372561 is about 80096.0208811898. The cubic root of 6415372561 is about 1858.1208679124.

The spelling of 6415372561 in words is "six billion, four hundred fifteen million, three hundred seventy-two thousand, five hundred sixty-one".