7947791464 has 8 divisors (see below), whose sum is σ = 14902109010. Its totient is φ = 3973895728.

The previous prime is 7947791459. The next prime is 7947791513. The reversal of 7947791464 is 4641977497.

It can be written as a sum of positive squares in only one way, i.e., 5620500900 + 2327290564 = 74970^2 + 48242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×7947791464³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7947791399 and 7947791408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496736959 + ... + 496736974.

Almost surely, 2^7947791464 is an apocalyptic number.

It is an amenable number.

7947791464 is a deficient number, since it is larger than the sum of its proper divisors (6954317546).

7947791464 is a wasteful number, since it uses less digits than its factorization.

7947791464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993473939 (or 993473935 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 58.

The square root of 7947791464 is about 89150.3867854761. The cubic root of 7947791464 is about 1995.6397898582.

The spelling of 7947791464 in words is "seven billion, nine hundred forty-seven million, seven hundred ninety-one thousand, four hundred sixty-four".