7854693664 has 24 divisors (see below), whose sum is σ = 15608457648. Its totient is φ = 3890640960.

The previous prime is 7854693661. The next prime is 7854693673. The reversal of 7854693664 is 4663964587.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7854693599 and 7854693608.

It is not an unprimeable number, because it can be changed into a prime (7854693661) 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, 1143582 + ... + 1150429.

It is an arithmetic number, because the mean of its divisors is an integer number (650352402).

Almost surely, 2^7854693664 is an apocalyptic number.

It is an amenable number.

7854693664 is a deficient number, since it is larger than the sum of its proper divisors (7753763984).

7854693664 is a wasteful number, since it uses less digits than its factorization.

7854693664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294128 (or 2294120 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 58.

The square root of 7854693664 is about 88626.7096534673. The cubic root of 7854693664 is about 1987.8170775531.

The spelling of 7854693664 in words is "seven billion, eight hundred fifty-four million, six hundred ninety-three thousand, six hundred sixty-four".