7821425516 has 12 divisors (see below), whose sum is σ = 14021336280. Its totient is φ = 3815329440.

The previous prime is 7821425509. The next prime is 7821425527. The reversal of 7821425516 is 6155241287.

It is a super-2 number, since 2×7821425516² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23845646 + ... + 23845973.

It is an arithmetic number, because the mean of its divisors is an integer number (1168444690).

Almost surely, 2^7821425516 is an apocalyptic number.

It is an amenable number.

7821425516 is a deficient number, since it is larger than the sum of its proper divisors (6199910764).

7821425516 is a wasteful number, since it uses less digits than its factorization.

7821425516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47691664 (or 47691662 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 7821425516 is about 88438.8235787881. The cubic root of 7821425516 is about 1985.0066739619.

The spelling of 7821425516 in words is "seven billion, eight hundred twenty-one million, four hundred twenty-five thousand, five hundred sixteen".