261462741547 has 4 divisors (see below), whose sum is σ = 298814561776. Its totient is φ = 224110921320.

The previous prime is 261462741503. The next prime is 261462741563. The reversal of 261462741547 is 745147264162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261462741547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261462741547.

It is not an unprimeable number, because it can be changed into a prime (261462741577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18675910104 + ... + 18675910117.

It is an arithmetic number, because the mean of its divisors is an integer number (74703640444).

Almost surely, 2^261462741547 is an apocalyptic number.

261462741547 is a deficient number, since it is larger than the sum of its proper divisors (37351820229).

261462741547 is an equidigital number, since it uses as much as digits as its factorization.

261462741547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37351820228.

The product of its digits is 2257920, while the sum is 49.

The spelling of 261462741547 in words is "two hundred sixty-one billion, four hundred sixty-two million, seven hundred forty-one thousand, five hundred forty-seven".