7643877505 has 16 divisors (see below), whose sum is σ = 10011475584. Its totient is φ = 5556436480.

The previous prime is 7643877481. The next prime is 7643877511. The reversal of 7643877505 is 5057783467.

It is not a de Polignac number, because 7643877505 - 2⁹ = 7643876993 is a prime.

It is a super-2 number, since 2×7643877505² (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 15 ways as a sum of consecutive naturals, for example, 81489 + ... + 148081.

It is an arithmetic number, because the mean of its divisors is an integer number (625717224).

Almost surely, 2^7643877505 is an apocalyptic number.

It is an amenable number.

7643877505 is a deficient number, since it is larger than the sum of its proper divisors (2367598079).

7643877505 is a wasteful number, since it uses less digits than its factorization.

7643877505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68696.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The square root of 7643877505 is about 87429.2714426925. The cubic root of 7643877505 is about 1969.8715424669.

The spelling of 7643877505 in words is "seven billion, six hundred forty-three million, eight hundred seventy-seven thousand, five hundred five".