265643690080 has 24 divisors (see below), whose sum is σ = 627583218192. Its totient is φ = 106257475968.

The previous prime is 265643690029. The next prime is 265643690101. The reversal of 265643690080 is 80096346562.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 830136372 + ... + 830136691.

It is an arithmetic number, because the mean of its divisors is an integer number (26149300758).

Almost surely, 2^265643690080 is an apocalyptic number.

265643690080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265643690080 is an abundant number, since it is smaller than the sum of its proper divisors (361939528112).

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

265643690080 is a wasteful number, since it uses less digits than its factorization.

265643690080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660273078 (or 1660273070 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 265643690080 in words is "two hundred sixty-five billion, six hundred forty-three million, six hundred ninety thousand, eighty".