261204341442 has 64 divisors (see below), whose sum is σ = 601943408640. Its totient is φ = 74730859200.

The previous prime is 261204341441. The next prime is 261204341443. The reversal of 261204341442 is 244143402162.

It is an interprime number because it is at equal distance from previous prime (261204341441) and next prime (261204341443).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (261204341441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11967 + ... + 722877.

It is an arithmetic number, because the mean of its divisors is an integer number (9405365760).

Almost surely, 2^261204341442 is an apocalyptic number.

261204341442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 261204341442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300971704320).

261204341442 is an abundant number, since it is smaller than the sum of its proper divisors (340739067198).

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

261204341442 is a wasteful number, since it uses less digits than its factorization.

261204341442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711239.

The product of its (nonzero) digits is 36864, while the sum is 33.

The spelling of 261204341442 in words is "two hundred sixty-one billion, two hundred four million, three hundred forty-one thousand, four hundred forty-two".