261433526155 has 32 divisors (see below), whose sum is σ = 333137556864. Its totient is φ = 196274190336.

The previous prime is 261433526119. The next prime is 261433526201. The reversal of 261433526155 is 551625334162.

It is not a de Polignac number, because 261433526155 - 2¹⁹ = 261433001867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46907949 + ... + 46913521.

It is an arithmetic number, because the mean of its divisors is an integer number (10410548652).

Almost surely, 2^261433526155 is an apocalyptic number.

261433526155 is a deficient number, since it is larger than the sum of its proper divisors (71704030709).

261433526155 is a wasteful number, since it uses less digits than its factorization.

261433526155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095.

The product of its digits is 648000, while the sum is 43.

The spelling of 261433526155 in words is "two hundred sixty-one billion, four hundred thirty-three million, five hundred twenty-six thousand, one hundred fifty-five".