7640220479 has 4 divisors (see below), whose sum is σ = 7649459784. Its totient is φ = 7630981176.

The previous prime is 7640220463. The next prime is 7640220499. The reversal of 7640220479 is 9740220467.

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

It is a cyclic number.

It is not a de Polignac number, because 7640220479 - 2⁴ = 7640220463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640220499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618412 + ... + 4620065.

It is an arithmetic number, because the mean of its divisors is an integer number (1912364946).

Almost surely, 2^7640220479 is an apocalyptic number.

7640220479 is a deficient number, since it is larger than the sum of its proper divisors (9239305).

7640220479 is an equidigital number, since it uses as much as digits as its factorization.

7640220479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9239304.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 7640220479 is about 87408.3547436971. The cubic root of 7640220479 is about 1969.5573467555.

The spelling of 7640220479 in words is "seven billion, six hundred forty million, two hundred twenty thousand, four hundred seventy-nine".