261702164 has 6 divisors (see below), whose sum is σ = 457978794. Its totient is φ = 130851080.

The previous prime is 261702163. The next prime is 261702179. The reversal of 261702164 is 461207162.

It can be written as a sum of positive squares in only one way, i.e., 131285764 + 130416400 = 11458^2 + 11420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261702163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32712767 + ... + 32712774.

It is an arithmetic number, because the mean of its divisors is an integer number (76329799).

Almost surely, 2^261702164 is an apocalyptic number.

It is an amenable number.

261702164 is a deficient number, since it is larger than the sum of its proper divisors (196276630).

261702164 is a wasteful number, since it uses less digits than its factorization.

261702164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65425545 (or 65425543 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 261702164 is about 16177.2112553431. The cubic root of 261702164 is about 639.6402307401.

The spelling of 261702164 in words is "two hundred sixty-one million, seven hundred two thousand, one hundred sixty-four".