261441435315534 has 32 divisors (see below), whose sum is σ = 523164043188000. Its totient is φ = 87100291711104.

The previous prime is 261441435315491. The next prime is 261441435315587. The reversal of 261441435315534 is 435513534144162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119739352 + ... + 121903220.

It is an arithmetic number, because the mean of its divisors is an integer number (16348876349625).

Almost surely, 2^{261441435315534} is an apocalyptic number.

261441435315534 is an abundant number, since it is smaller than the sum of its proper divisors (261722607872466).

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

261441435315534 is a wasteful number, since it uses less digits than its factorization.

261441435315534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174692.

The product of its digits is 10368000, while the sum is 51.

Adding to 261441435315534 its reverse (435513534144162), we get a palindrome (696954969459696).

The spelling of 261441435315534 in words is "two hundred sixty-one trillion, four hundred forty-one billion, four hundred thirty-five million, three hundred fifteen thousand, five hundred thirty-four".