261422520261702 has 16 divisors (see below), whose sum is σ = 522853826629680. Its totient is φ = 87139375736192.

The previous prime is 261422520261689. The next prime is 261422520261731. The reversal of 261422520261702 is 207162025224162.

It is a happy number.

It is a congruent number.

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, 365700927 + ... + 366415082.

It is an arithmetic number, because the mean of its divisors is an integer number (32678364164355).

Almost surely, 2^{261422520261702} is an apocalyptic number.

261422520261702 is an abundant number, since it is smaller than the sum of its proper divisors (261431306367978).

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

261422520261702 is a wasteful number, since it uses less digits than its factorization.

261422520261702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732175527.

The product of its (nonzero) digits is 322560, while the sum is 42.

Adding to 261422520261702 its reverse (207162025224162), we get a palindrome (468584545485864).

The spelling of 261422520261702 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, five hundred twenty million, two hundred sixty-one thousand, seven hundred two".