261554034062326 has 64 divisors (see below), whose sum is σ = 415761186597120. Its totient is φ = 123061102623360.

The previous prime is 261554034062297. The next prime is 261554034062357. The reversal of 261554034062326 is 623260430455162.

It is a self number, because there is not a number n which added to its sum of digits gives 261554034062326.

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, 52195973161 + ... + 52195978171.

It is an arithmetic number, because the mean of its divisors is an integer number (6496268540580).

Almost surely, 2^{261554034062326} is an apocalyptic number.

261554034062326 is a deficient number, since it is larger than the sum of its proper divisors (154207152534794).

261554034062326 is a wasteful number, since it uses less digits than its factorization.

261554034062326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 261554034062326 in words is "two hundred sixty-one trillion, five hundred fifty-four billion, thirty-four million, sixty-two thousand, three hundred twenty-six".