261438587062006 has 4 divisors (see below), whose sum is σ = 392157880593012. Its totient is φ = 130719293531002.

The previous prime is 261438587061959. The next prime is 261438587062033. The reversal of 261438587062006 is 600260785834162.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×261438587062006³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65359646765500 + ... + 65359646765503.

It is an arithmetic number, because the mean of its divisors is an integer number (98039470148253).

Almost surely, 2^{261438587062006} is an apocalyptic number.

261438587062006 is a deficient number, since it is larger than the sum of its proper divisors (130719293531006).

261438587062006 is a wasteful number, since it uses less digits than its factorization.

261438587062006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130719293531005.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 261438587062006 in words is "two hundred sixty-one trillion, four hundred thirty-eight billion, five hundred eighty-seven million, sixty-two thousand, six".