7915940385 has 8 divisors (see below), whose sum is σ = 12665504640. Its totient is φ = 4221834864.

The previous prime is 7915940371. The next prime is 7915940393. The reversal of 7915940385 is 5830495197.

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

It is not a de Polignac number, because 7915940385 - 2⁹ = 7915939873 is a prime.

It is a super-2 number, since 2×7915940385² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263864665 + ... + 263864694.

It is an arithmetic number, because the mean of its divisors is an integer number (1583188080).

Almost surely, 2^7915940385 is an apocalyptic number.

It is an amenable number.

7915940385 is a deficient number, since it is larger than the sum of its proper divisors (4749564255).

7915940385 is a wasteful number, since it uses less digits than its factorization.

7915940385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527729367.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The square root of 7915940385 is about 88971.5706560247. The cubic root of 7915940385 is about 1992.9703530634.

The spelling of 7915940385 in words is "seven billion, nine hundred fifteen million, nine hundred forty thousand, three hundred eighty-five".