261554034407106 has 16 divisors (see below), whose sum is σ = 597837792930624. Its totient is φ = 74729724116304.

The previous prime is 261554034407063. The next prime is 261554034407131. The reversal of 261554034407106 is 601704430455162.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3113738504805 + ... + 3113738504888.

It is an arithmetic number, because the mean of its divisors is an integer number (37364862058164).

Almost surely, 2^{261554034407106} is an apocalyptic number.

261554034407106 is an abundant number, since it is smaller than the sum of its proper divisors (336283758523518).

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

261554034407106 is a wasteful number, since it uses less digits than its factorization.

261554034407106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227477009705.

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 261554034407106 in words is "two hundred sixty-one trillion, five hundred fifty-four billion, thirty-four million, four hundred seven thousand, one hundred six".