265212135151561 has 16 divisors (see below), whose sum is σ = 296411833186560. Its totient is φ = 235609405657920.

The previous prime is 265212135151459. The next prime is 265212135151567. The reversal of 265212135151561 is 165151531212562.

265212135151561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 265212135151561 - 2²⁹ = 265211598280649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265212135151567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1130880285 + ... + 1131114778.

It is an arithmetic number, because the mean of its divisors is an integer number (18525739574160).

Almost surely, 2^{265212135151561} is an apocalyptic number.

It is an amenable number.

265212135151561 is a deficient number, since it is larger than the sum of its proper divisors (31199698034999).

265212135151561 is a wasteful number, since it uses less digits than its factorization.

265212135151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261995416.

The product of its digits is 540000, while the sum is 46.

The spelling of 265212135151561 in words is "two hundred sixty-five trillion, two hundred twelve billion, one hundred thirty-five million, one hundred fifty-one thousand, five hundred sixty-one".