261622876 has 6 divisors (see below), whose sum is σ = 457840040. Its totient is φ = 130811436.

The previous prime is 261622849. The next prime is 261622939. The reversal of 261622876 is 678226162.

It is a super-2 number, since 2×261622876² = 136893058493022752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32702856 + ... + 32702863.

Almost surely, 2^261622876 is an apocalyptic number.

It is an amenable number.

261622876 is a deficient number, since it is larger than the sum of its proper divisors (196217164).

261622876 is a wasteful number, since it uses less digits than its factorization.

261622876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65405723 (or 65405721 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 261622876 is about 16174.7604619048. The cubic root of 261622876 is about 639.5756268707.

The spelling of 261622876 in words is "two hundred sixty-one million, six hundred twenty-two thousand, eight hundred seventy-six".