7835687945 has 4 divisors (see below), whose sum is σ = 9402825540. Its totient is φ = 6268550352.

The previous prime is 7835687911. The next prime is 7835687953. The reversal of 7835687945 is 5497865387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5497865387 = 7 ⋅785409341.

It can be written as a sum of positive squares in 2 ways, for example, as 5344779664 + 2490908281 = 73108^2 + 49909^2 .

It is a cyclic number.

It is not a de Polignac number, because 7835687945 - 2¹⁴ = 7835671561 is a prime.

It is a super-2 number, since 2×7835687945² (a number of 21 digits) contains 22 as substring.

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, 783568790 + ... + 783568799.

It is an arithmetic number, because the mean of its divisors is an integer number (2350706385).

Almost surely, 2^7835687945 is an apocalyptic number.

It is an amenable number.

7835687945 is a deficient number, since it is larger than the sum of its proper divisors (1567137595).

7835687945 is a wasteful number, since it uses less digits than its factorization.

7835687945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567137594.

The product of its digits is 50803200, while the sum is 62.

The square root of 7835687945 is about 88519.4212870825. The cubic root of 7835687945 is about 1986.2124995775.

The spelling of 7835687945 in words is "seven billion, eight hundred thirty-five million, six hundred eighty-seven thousand, nine hundred forty-five".