261077826 has 16 divisors (see below), whose sum is σ = 523656000. Its totient is φ = 86775888.

The previous prime is 261077813. The next prime is 261077827. The reversal of 261077826 is 628770162.

It is not an unprimeable number, because it can be changed into a prime (261077827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60246 + ... + 64433.

It is an arithmetic number, because the mean of its divisors is an integer number (32728500).

Almost surely, 2^261077826 is an apocalyptic number.

261077826 is an abundant number, since it is smaller than the sum of its proper divisors (262578174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261077826 is a wasteful number, since it uses less digits than its factorization.

261077826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125033.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 261077826 is about 16157.9028961063. The cubic root of 261077826 is about 639.1311664242.

It can be divided in two parts, 26107 and 7826, that added together give a palindrome (33933).

The spelling of 261077826 in words is "two hundred sixty-one million, seventy-seven thousand, eight hundred twenty-six".