690768782500 has 60 divisors (see below), whose sum is σ = 1511047244476. Its totient is φ = 276220800000.

The previous prime is 690768782477. The next prime is 690768782503. The reversal of 690768782500 is 5287867096.

It can be written as a sum of positive squares in 10 ways, for example, as 301699729984 + 389069052516 = 549272^2 + 623754^2 .

It is not an unprimeable number, because it can be changed into a prime (690768782503) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8240800 + ... + 8324200.

Almost surely, 2^690768782500 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 690768782500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755523622238).

690768782500 is an abundant number, since it is smaller than the sum of its proper divisors (820278461976).

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

690768782500 is a wasteful number, since it uses less digits than its factorization.

690768782500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86738 (or 86721 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 690768782500 in words is "six hundred ninety billion, seven hundred sixty-eight million, seven hundred eighty-two thousand, five hundred".