261401464 has 16 divisors (see below), whose sum is σ = 491587200. Its totient is φ = 130311552.

The previous prime is 261401423. The next prime is 261401471. The reversal of 261401464 is 464104162.

261401464 is digitally balanced in base 3, 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 3 ways as a sum of consecutive naturals, for example, 45784 + ... + 51175.

It is an arithmetic number, because the mean of its divisors is an integer number (30724200).

Almost surely, 2^261401464 is an apocalyptic number.

It is an amenable number.

261401464 is a deficient number, since it is larger than the sum of its proper divisors (230185736).

261401464 is a wasteful number, since it uses less digits than its factorization.

261401464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97302 (or 97298 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 261401464 is about 16167.9146459894. The cubic root of 261401464 is about 639.3951512081.

The spelling of 261401464 in words is "two hundred sixty-one million, four hundred one thousand, four hundred sixty-four".