7840004645 has 8 divisors (see below), whose sum is σ = 10263278880. Its totient is φ = 5701821520.

The previous prime is 7840004609. The next prime is 7840004647. The reversal of 7840004645 is 5464000487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7840004645 - 2⁶ = 7840004581 is a prime.

It is a super-2 number, since 2×7840004645² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7840004599 and 7840004608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840004647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71272715 + ... + 71272824.

It is an arithmetic number, because the mean of its divisors is an integer number (1282909860).

Almost surely, 2^7840004645 is an apocalyptic number.

It is an amenable number.

7840004645 is a deficient number, since it is larger than the sum of its proper divisors (2423274235).

7840004645 is a wasteful number, since it uses less digits than its factorization.

7840004645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142545555.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 7840004645 is about 88543.8007146745. The cubic root of 7840004645 is about 1986.5771690905.

The spelling of 7840004645 in words is "seven billion, eight hundred forty million, four thousand, six hundred forty-five".