261451053007105 has 16 divisors (see below), whose sum is σ = 338056179378624. Its totient is φ = 192968134027200.

The previous prime is 261451053007051. The next prime is 261451053007127. The reversal of 261451053007105 is 501700350154162.

It is a happy number.

It is not a de Polignac number, because 261451053007105 - 2⁷ = 261451053006977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077094471 + ... + 1077337180.

It is an arithmetic number, because the mean of its divisors is an integer number (21128511211164).

Almost surely, 2^{261451053007105} is an apocalyptic number.

It is an amenable number.

261451053007105 is a deficient number, since it is larger than the sum of its proper divisors (76605126371519).

261451053007105 is a wasteful number, since it uses less digits than its factorization.

261451053007105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154433536.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 261451053007105 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, fifty-three million, seven thousand, one hundred five".