265890242980 has 24 divisors (see below), whose sum is σ = 564643328760. Its totient is φ = 105161084160.

The previous prime is 265890242977. The next prime is 265890243007. The reversal of 265890242980 is 89242098562.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2066247936 + 263823995044 = 45456^2 + 513638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74686491 + ... + 74690050.

It is an arithmetic number, because the mean of its divisors is an integer number (23526805365).

Almost surely, 2^265890242980 is an apocalyptic number.

265890242980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265890242980 is an abundant number, since it is smaller than the sum of its proper divisors (298753085780).

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

265890242980 is a wasteful number, since it uses less digits than its factorization.

265890242980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149376639 (or 149376637 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 265890242980 in words is "two hundred sixty-five billion, eight hundred ninety million, two hundred forty-two thousand, nine hundred eighty".