261840027152 has 40 divisors (see below), whose sum is σ = 554274658080. Its totient is φ = 118837537280.

The previous prime is 261840027149. The next prime is 261840027173. The reversal of 261840027152 is 251720048162.

It is a super-2 number, since 2×261840027152² (a number of 24 digits) contains 22 as substring.

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, 1012793 + ... + 1244760.

It is an arithmetic number, because the mean of its divisors is an integer number (13856866452).

Almost surely, 2^261840027152 is an apocalyptic number.

261840027152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261840027152 is an abundant number, since it is smaller than the sum of its proper divisors (292434630928).

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

261840027152 is a wasteful number, since it uses less digits than its factorization.

261840027152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258231 (or 2258225 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 261840027152 in words is "two hundred sixty-one billion, eight hundred forty million, twenty-seven thousand, one hundred fifty-two".