7620865780 has 96 divisors (see below), whose sum is σ = 18240380928. Its totient is φ = 2649321600.

The previous prime is 7620865753. The next prime is 7620865787. The reversal of 7620865780 is 875680267.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7620865787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559329 + ... + 572791.

It is an arithmetic number, because the mean of its divisors is an integer number (190003968).

Almost surely, 2^7620865780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7620865780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9120190464).

7620865780 is an abundant number, since it is smaller than the sum of its proper divisors (10619515148).

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

7620865780 is a wasteful number, since it uses less digits than its factorization.

7620865780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13597 (or 13595 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 7620865780 is about 87297.5702983766. The cubic root of 7620865780 is about 1967.8928038451.

The spelling of 7620865780 in words is "seven billion, six hundred twenty million, eight hundred sixty-five thousand, seven hundred eighty".