261562251346 has 32 divisors (see below), whose sum is σ = 444000372480. Its totient is φ = 114523843200.

The previous prime is 261562251343. The next prime is 261562251367. The reversal of 261562251346 is 643152265162.

261562251346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261562251346² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261562251343) 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 15 ways as a sum of consecutive naturals, for example, 1764061 + ... + 1906576.

It is an arithmetic number, because the mean of its divisors is an integer number (13875011640).

Almost surely, 2^261562251346 is an apocalyptic number.

261562251346 is a deficient number, since it is larger than the sum of its proper divisors (182438121134).

261562251346 is a wasteful number, since it uses less digits than its factorization.

261562251346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670770.

The product of its digits is 518400, while the sum is 43.

The spelling of 261562251346 in words is "two hundred sixty-one billion, five hundred sixty-two million, two hundred fifty-one thousand, three hundred forty-six".