7765003620 has 72 divisors (see below), whose sum is σ = 25695109440. Its totient is φ = 1882424640.

The previous prime is 7765003613. The next prime is 7765003627. The reversal of 7765003620 is 263005677.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7765003613) and next prime (7765003627).

It is a super-2 number, since 2×7765003620² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7765003627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1958880 + ... + 1962839.

It is an arithmetic number, because the mean of its divisors is an integer number (356876520).

Almost surely, 2^7765003620 is an apocalyptic number.

It is an amenable number.

7765003620 is an abundant number, since it is smaller than the sum of its proper divisors (17930105820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7765003620 is a wasteful number, since it uses less digits than its factorization.

7765003620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921745 (or 3921740 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 7765003620 is about 88119.2579405887. The cubic root of 7765003620 is about 1980.2220289737. Note that the first 3 decimals are identical.

The spelling of 7765003620 in words is "seven billion, seven hundred sixty-five million, three thousand, six hundred twenty".