261681002 has 8 divisors (see below), whose sum is σ = 428205312. Its totient is φ = 118945900.

The previous prime is 261680957. The next prime is 261681023. The reversal of 261681002 is 200186162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5947274 + ... + 5947317.

It is an arithmetic number, because the mean of its divisors is an integer number (53525664).

Almost surely, 2^261681002 is an apocalyptic number.

261681002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261681002 is a deficient number, since it is larger than the sum of its proper divisors (166524310).

261681002 is a wasteful number, since it uses less digits than its factorization.

261681002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11894604.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 261681002 is about 16176.5571738859. The cubic root of 261681002 is about 639.6229892174.

The spelling of 261681002 in words is "two hundred sixty-one million, six hundred eighty-one thousand, two".