261156002 has 8 divisors (see below), whose sum is σ = 392857500. Its totient is φ = 130203504.

The previous prime is 261155987. The next prime is 261156011. The reversal of 261156002 is 200651162.

261156002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 243016921 + 18139081 = 15589^2 + 4259^2 .

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, 186377 + ... + 187772.

Almost surely, 2^261156002 is an apocalyptic number.

261156002 is a deficient number, since it is larger than the sum of its proper divisors (131701498).

261156002 is a wasteful number, since it uses less digits than its factorization.

261156002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374500.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 261156002 is about 16160.3218408545. The cubic root of 261156002 is about 639.1949529364.

The spelling of 261156002 in words is "two hundred sixty-one million, one hundred fifty-six thousand, two".