261001151266 has 16 divisors (see below), whose sum is σ = 432554338944. Its totient is φ = 117483893824.

The previous prime is 261001151251. The next prime is 261001151267. The reversal of 261001151266 is 662151100162.

It is a super-3 number, since 3×261001151266³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261001151267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166879750 + ... + 166881313.

It is an arithmetic number, because the mean of its divisors is an integer number (27034646184).

Almost surely, 2^261001151266 is an apocalyptic number.

261001151266 is a deficient number, since it is larger than the sum of its proper divisors (171553187678).

261001151266 is a wasteful number, since it uses less digits than its factorization.

261001151266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333761105.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 261001151266 in words is "two hundred sixty-one billion, one million, one hundred fifty-one thousand, two hundred sixty-six".