261012624 has 40 divisors (see below), whose sum is σ = 675171072. Its totient is φ = 86889600.

The previous prime is 261012613. The next prime is 261012643. The reversal of 261012624 is 426210162.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 261012594 and 261012603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38274 + ... + 44574.

Almost surely, 2^261012624 is an apocalyptic number.

261012624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261012624 is an abundant number, since it is smaller than the sum of its proper divisors (414158448).

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

261012624 is a wasteful number, since it uses less digits than its factorization.

261012624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175 (or 7169 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 261012624 is about 16155.8851196708. The cubic root of 261012624 is about 639.0779561094.

Adding to 261012624 its reverse (426210162), we get a palindrome (687222786).

The spelling of 261012624 in words is "two hundred sixty-one million, twelve thousand, six hundred twenty-four".