7885151081 has 4 divisors (see below), whose sum is σ = 7984963200. Its totient is φ = 7785338964.

The previous prime is 7885151077. The next prime is 7885151093. The reversal of 7885151081 is 1801515887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1801515887 = 137 ⋅13149751.

It is a cyclic number.

It is not a de Polignac number, because 7885151081 - 2² = 7885151077 is a prime.

It is a super-2 number, since 2×7885151081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7885151051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49905941 + ... + 49906098.

It is an arithmetic number, because the mean of its divisors is an integer number (1996240800).

Almost surely, 2^7885151081 is an apocalyptic number.

It is an amenable number.

7885151081 is a deficient number, since it is larger than the sum of its proper divisors (99812119).

7885151081 is an equidigital number, since it uses as much as digits as its factorization.

7885151081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99812118.

The product of its (nonzero) digits is 89600, while the sum is 44.

The square root of 7885151081 is about 88798.3731889273. The cubic root of 7885151081 is about 1990.3830883737.

The spelling of 7885151081 in words is "seven billion, eight hundred eighty-five million, one hundred fifty-one thousand, eighty-one".