6465037780 has 24 divisors (see below), whose sum is σ = 14375202408. Its totient is φ = 2433896448.

The previous prime is 6465037769. The next prime is 6465037783. The reversal of 6465037780 is 877305646.

It can be written as a sum of positive squares in 4 ways, for example, as 2950445124 + 3514592656 = 54318^2 + 59284^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6465037780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465037783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9507069 + ... + 9507748.

It is an arithmetic number, because the mean of its divisors is an integer number (598966767).

Almost surely, 2^6465037780 is an apocalyptic number.

It is an amenable number.

6465037780 is an abundant number, since it is smaller than the sum of its proper divisors (7910164628).

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

6465037780 is a wasteful number, since it uses less digits than its factorization.

6465037780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19014843 (or 19014841 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 6465037780 is about 80405.4586455422. The cubic root of 6465037780 is about 1862.9034873771.

The spelling of 6465037780 in words is "six billion, four hundred sixty-five million, thirty-seven thousand, seven hundred eighty".