7855799616 has 336 divisors, whose sum is σ = 26361054720. Its totient is φ = 2190689280.

The previous prime is 7855799573. The next prime is 7855799659. The reversal of 7855799616 is 6169975587.

7855799616 is a `hidden beast` number, since 7 + 8 + 5 + 5 + 7 + 9 + 9 + 616 = 666.

It is an interprime number because it is at equal distance from previous prime (7855799573) and next prime (7855799659).

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-3 number, since 3×7855799616³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56516475 + ... + 56516613.

It is an arithmetic number, because the mean of its divisors is an integer number (78455520).

Almost surely, 2^7855799616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7855799616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13180527360).

7855799616 is an abundant number, since it is smaller than the sum of its proper divisors (18505255104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7855799616 is a wasteful number, since it uses less digits than its factorization.

7855799616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 389 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 63.

The square root of 7855799616 is about 88632.9488170173. The cubic root of 7855799616 is about 1987.9103689953.

The spelling of 7855799616 in words is "seven billion, eight hundred fifty-five million, seven hundred ninety-nine thousand, six hundred sixteen".