261102342044 has 24 divisors (see below), whose sum is σ = 473359723200. Its totient is φ = 125869553600.

The previous prime is 261102342029. The next prime is 261102342047. The reversal of 261102342044 is 440243201162.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 261102341998 and 261102342016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261102342047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524164 + ... + 1686795.

It is an arithmetic number, because the mean of its divisors is an integer number (19723321800).

Almost surely, 2^261102342044 is an apocalyptic number.

It is an amenable number.

261102342044 is a deficient number, since it is larger than the sum of its proper divisors (212257381156).

261102342044 is a wasteful number, since it uses less digits than its factorization.

261102342044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211693 (or 3211691 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 261102342044 in words is "two hundred sixty-one billion, one hundred two million, three hundred forty-two thousand, forty-four".