7892688081 has 4 divisors (see below), whose sum is σ = 10523584112. Its totient is φ = 5261792052.

The previous prime is 7892688029. The next prime is 7892688157. The reversal of 7892688081 is 1808862987.

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: 1808862987 = 3 ⋅602954329.

It is not a de Polignac number, because 7892688081 - 2⁷ = 7892687953 is a prime.

It is a super-2 number, since 2×7892688081² (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 (7892683081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315448011 + ... + 1315448016.

It is an arithmetic number, because the mean of its divisors is an integer number (2630896028).

Almost surely, 2^7892688081 is an apocalyptic number.

It is an amenable number.

7892688081 is a deficient number, since it is larger than the sum of its proper divisors (2630896031).

7892688081 is a wasteful number, since it uses less digits than its factorization.

7892688081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630896030.

The product of its (nonzero) digits is 3096576, while the sum is 57.

The square root of 7892688081 is about 88840.8018930491. The cubic root of 7892688081 is about 1991.0170538277.

The spelling of 7892688081 in words is "seven billion, eight hundred ninety-two million, six hundred eighty-eight thousand, eighty-one".