7581385157 has 8 divisors (see below), whose sum is σ = 7597396800. Its totient is φ = 7565392224.

The previous prime is 7581385151. The next prime is 7581385223. The reversal of 7581385157 is 7515831857.

7581385157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7581385157 - 2¹⁶ = 7581319621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7581385151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033898 + ... + 1041204.

It is an arithmetic number, because the mean of its divisors is an integer number (949674600).

Almost surely, 2^7581385157 is an apocalyptic number.

It is an amenable number.

7581385157 is a deficient number, since it is larger than the sum of its proper divisors (16011643).

7581385157 is a wasteful number, since it uses less digits than its factorization.

7581385157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9355.

The product of its digits is 1176000, while the sum is 50.

The square root of 7581385157 is about 87071.1499694359. The cubic root of 7581385157 is about 1964.4886329782.

The spelling of 7581385157 in words is "seven billion, five hundred eighty-one million, three hundred eighty-five thousand, one hundred fifty-seven".