1275500261061 has 12 divisors (see below), whose sum is σ = 1984111517388. Its totient is φ = 784923237504.

The previous prime is 1275500261027. The next prime is 1275500261071. The reversal of 1275500261061 is 1601620055721.

1275500261061 is a `hidden beast` number, since 1 + 2 + 75 + 500 + 26 + 1 + 0 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 96592910436 + 1178907350625 = 310794^2 + 1085775^2 .

It is not a de Polignac number, because 1275500261061 - 2⁶ = 1275500260997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275500261071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5450855700 + ... + 5450855933.

It is an arithmetic number, because the mean of its divisors is an integer number (165342626449).

Almost surely, 2^{1275500261061} is an apocalyptic number.

It is an amenable number.

1275500261061 is a deficient number, since it is larger than the sum of its proper divisors (708611256327).

1275500261061 is a wasteful number, since it uses less digits than its factorization.

1275500261061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10901711652 (or 10901711649 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 1275500261061 in words is "one trillion, two hundred seventy-five billion, five hundred million, two hundred sixty-one thousand, sixty-one".