261432020435642 has 16 divisors (see below), whose sum is σ = 448393599158400. Its totient is φ = 111986189155248.

The previous prime is 261432020435627. The next prime is 261432020435731. The reversal of 261432020435642 is 246534020234162.

261432020435642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261432020435593 and 261432020435602.

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, 4675414142 + ... + 4675470057.

It is an arithmetic number, because the mean of its divisors is an integer number (28024599947400).

Almost surely, 2^{261432020435642} is an apocalyptic number.

261432020435642 is a deficient number, since it is larger than the sum of its proper divisors (186961578722758).

261432020435642 is a wasteful number, since it uses less digits than its factorization.

261432020435642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9350886205.

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 261432020435642 in words is "two hundred sixty-one trillion, four hundred thirty-two billion, twenty million, four hundred thirty-five thousand, six hundred forty-two".