261181948470 has 64 divisors (see below), whose sum is σ = 654280381440. Its totient is φ = 66600978048.

The previous prime is 261181948463. The next prime is 261181948471. The reversal of 261181948470 is 74849181162.

261181948470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261181948471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2402532 + ... + 2508888.

It is an arithmetic number, because the mean of its divisors is an integer number (10223130960).

Almost surely, 2^261181948470 is an apocalyptic number.

261181948470 is an abundant number, since it is smaller than the sum of its proper divisors (393098432970).

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

261181948470 is a wasteful number, since it uses less digits than its factorization.

261181948470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109949.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 261181948470 in words is "two hundred sixty-one billion, one hundred eighty-one million, nine hundred forty-eight thousand, four hundred seventy".