261326462415 has 32 divisors (see below), whose sum is σ = 436351726080. Its totient is φ = 133299044736.

The previous prime is 261326462407. The next prime is 261326462447. The reversal of 261326462415 is 514264623162.

It is a happy number.

It is not a de Polignac number, because 261326462415 - 2³ = 261326462407 is a prime.

It is a congruent 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, 3343401 + ... + 3420669.

It is an arithmetic number, because the mean of its divisors is an integer number (13635991440).

Almost surely, 2^261326462415 is an apocalyptic number.

261326462415 is a deficient number, since it is larger than the sum of its proper divisors (175025263665).

261326462415 is a wasteful number, since it uses less digits than its factorization.

261326462415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87103.

The product of its digits is 414720, while the sum is 42.

The spelling of 261326462415 in words is "two hundred sixty-one billion, three hundred twenty-six million, four hundred sixty-two thousand, four hundred fifteen".