7645255042 has 4 divisors (see below), whose sum is σ = 11467882566. Its totient is φ = 3822627520.

The previous prime is 7645255019. The next prime is 7645255063. The reversal of 7645255042 is 2405525467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7572306361 + 72948681 = 87019^2 + 8541^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7645254986 and 7645255004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1911313759 + ... + 1911313762.

Almost surely, 2^7645255042 is an apocalyptic number.

7645255042 is a deficient number, since it is larger than the sum of its proper divisors (3822627524).

7645255042 is a wasteful number, since it uses less digits than its factorization.

7645255042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822627523.

The product of its (nonzero) digits is 336000, while the sum is 40.

The square root of 7645255042 is about 87437.1490957934. The cubic root of 7645255042 is about 1969.9898684492.

The spelling of 7645255042 in words is "seven billion, six hundred forty-five million, two hundred fifty-five thousand, forty-two".