261481864430 has 16 divisors (see below), whose sum is σ = 470808799920. Its totient is φ = 104561313792.

The previous prime is 261481864379. The next prime is 261481864433. The reversal of 261481864430 is 34468184162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261481864433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894044 + ... + 3960623.

It is an arithmetic number, because the mean of its divisors is an integer number (29425549995).

Almost surely, 2^261481864430 is an apocalyptic number.

261481864430 is a deficient number, since it is larger than the sum of its proper divisors (209326935490).

261481864430 is a wasteful number, since it uses less digits than its factorization.

261481864430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7858003.

The product of its (nonzero) digits is 884736, while the sum is 47.

The spelling of 261481864430 in words is "two hundred sixty-one billion, four hundred eighty-one million, eight hundred sixty-four thousand, four hundred thirty".