7821008451 has 24 divisors (see below), whose sum is σ = 11347908000. Its totient is φ = 5190573312.

The previous prime is 7821008417. The next prime is 7821008477. The reversal of 7821008451 is 1548001287.

7821008451 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7821008451 - 2¹⁰ = 7821007427 is a prime.

It is a super-2 number, since 2×7821008451² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821001451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2009115 + ... + 2013003.

It is an arithmetic number, because the mean of its divisors is an integer number (472829500).

Almost surely, 2^7821008451 is an apocalyptic number.

7821008451 is a deficient number, since it is larger than the sum of its proper divisors (3526899549).

7821008451 is a wasteful number, since it uses less digits than its factorization.

7821008451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4840 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 7821008451 is about 88436.4656179791. The cubic root of 7821008451 is about 1984.9713908999.

The spelling of 7821008451 in words is "seven billion, eight hundred twenty-one million, eight thousand, four hundred fifty-one".