7478293681 has 4 divisors (see below), whose sum is σ = 7480591600. Its totient is φ = 7475995764.

The previous prime is 7478293651. The next prime is 7478293699. The reversal of 7478293681 is 1863928747.

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.

It is a cyclic number.

It is not a de Polignac number, because 7478293681 - 2⁷ = 7478293553 is a prime.

It is a super-2 number, since 2×7478293681² (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 (7478293621) 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, 1144071 + ... + 1150588.

It is an arithmetic number, because the mean of its divisors is an integer number (1870147900).

Almost surely, 2^7478293681 is an apocalyptic number.

It is an amenable number.

7478293681 is a deficient number, since it is larger than the sum of its proper divisors (2297919).

7478293681 is a wasteful number, since it uses less digits than its factorization.

7478293681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297918.

The product of its digits is 4064256, while the sum is 55.

The square root of 7478293681 is about 86477.1280802040. The cubic root of 7478293681 is about 1955.5436099679.

The spelling of 7478293681 in words is "seven billion, four hundred seventy-eight million, two hundred ninety-three thousand, six hundred eighty-one".