261554612 has 24 divisors (see below), whose sum is σ = 499763712. Its totient is φ = 118785600.

The previous prime is 261554609. The next prime is 261554633. The reversal of 261554612 is 216455162.

261554612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 75437 + ... + 78827.

It is an arithmetic number, because the mean of its divisors is an integer number (20823488).

Almost surely, 2^261554612 is an apocalyptic number.

261554612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261554612 is a deficient number, since it is larger than the sum of its proper divisors (238209100).

261554612 is a wasteful number, since it uses less digits than its factorization.

261554612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159 (or 5157 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 261554612 is about 16172.6501229700. The cubic root of 261554612 is about 639.5199949001.

The spelling of 261554612 in words is "two hundred sixty-one million, five hundred fifty-four thousand, six hundred twelve".