7651821516 has 96 divisors (see below), whose sum is σ = 19761573888. Its totient is φ = 2292111360.

The previous prime is 7651821469. The next prime is 7651821553. The reversal of 7651821516 is 6151281567.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3569541 + ... + 3571683.

It is an arithmetic number, because the mean of its divisors is an integer number (205849728).

Almost surely, 2^7651821516 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 7651821516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9880786944).

7651821516 is an abundant number, since it is smaller than the sum of its proper divisors (12109752372).

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

7651821516 is a wasteful number, since it uses less digits than its factorization.

7651821516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951 (or 2949 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 7651821516 is about 87474.6907168011. The cubic root of 7651821516 is about 1970.5537120978.

It can be divided in two parts, 765 and 1821516, that added together give a palindrome (1822281).

The spelling of 7651821516 in words is "seven billion, six hundred fifty-one million, eight hundred twenty-one thousand, five hundred sixteen".