7640361819 has 24 divisors (see below), whose sum is σ = 11307856560. Its totient is φ = 4968456192.

The previous prime is 7640361811. The next prime is 7640361823. The reversal of 7640361819 is 9181630467.

It is a happy number.

It is not a de Polignac number, because 7640361819 - 2³ = 7640361811 is a prime.

It is a super-2 number, since 2×7640361819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7640361811) 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, 284767 + ... + 310439.

It is an arithmetic number, because the mean of its divisors is an integer number (471160690).

Almost surely, 2^7640361819 is an apocalyptic number.

7640361819 is a deficient number, since it is larger than the sum of its proper divisors (3667494741).

7640361819 is a wasteful number, since it uses less digits than its factorization.

7640361819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26491 (or 26488 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 7640361819 is about 87409.1632439071. The cubic root of 7640361819 is about 1969.5694919337.

The spelling of 7640361819 in words is "seven billion, six hundred forty million, three hundred sixty-one thousand, eight hundred nineteen".