261949419 has 12 divisors (see below), whose sum is σ = 378513616. Its totient is φ = 174567312.

The previous prime is 261949399. The next prime is 261949423. The reversal of 261949419 is 914949162.

It is not a de Polignac number, because 261949419 - 2¹⁶ = 261883883 is a prime.

It is a super-2 number, since 2×261949419² = 137234996228875122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261949469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37917 + ... + 44289.

Almost surely, 2^261949419 is an apocalyptic number.

261949419 is a deficient number, since it is larger than the sum of its proper divisors (116564197).

261949419 is a wasteful number, since it uses less digits than its factorization.

261949419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10946 (or 10943 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 261949419 is about 16184.8515285127. The cubic root of 261949419 is about 639.8416103812.

The spelling of 261949419 in words is "two hundred sixty-one million, nine hundred forty-nine thousand, four hundred nineteen".