1261032115533 has 16 divisors (see below), whose sum is σ = 1714338570240. Its totient is φ = 824281277744.

The previous prime is 1261032115507. The next prime is 1261032115543. The reversal of 1261032115533 is 3355112301621.

It is a cyclic number.

It is not a de Polignac number, because 1261032115533 - 2⁵ = 1261032115501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261032115494 and 1261032115503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261032115543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9233091 + ... + 9368672.

It is an arithmetic number, because the mean of its divisors is an integer number (107146160640).

Almost surely, 2^{1261032115533} is an apocalyptic number.

It is an amenable number.

1261032115533 is a deficient number, since it is larger than the sum of its proper divisors (453306454707).

1261032115533 is a wasteful number, since it uses less digits than its factorization.

1261032115533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18602208.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 1261032115533 in words is "one trillion, two hundred sixty-one billion, thirty-two million, one hundred fifteen thousand, five hundred thirty-three".