261064514 has 4 divisors (see below), whose sum is σ = 391596774. Its totient is φ = 130532256.

The previous prime is 261064499. The next prime is 261064537. The reversal of 261064514 is 415460162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 257763025 + 3301489 = 16055^2 + 1817^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65266127 + ... + 65266130.

Almost surely, 2^261064514 is an apocalyptic number.

261064514 is a deficient number, since it is larger than the sum of its proper divisors (130532260).

261064514 is a wasteful number, since it uses less digits than its factorization.

261064514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130532259.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 261064514 is about 16157.4909562098. The cubic root of 261064514 is about 639.1203034326.

The spelling of 261064514 in words is "two hundred sixty-one million, sixty-four thousand, five hundred fourteen".