1351140435261 has 64 divisors (see below), whose sum is σ = 2223671961600. Its totient is φ = 806976691200.

The previous prime is 1351140435259. The next prime is 1351140435299. The reversal of 1351140435261 is 1625340411531.

1351140435261 is a `hidden beast` number, since 1 + 3 + 51 + 1 + 40 + 43 + 526 + 1 = 666.

It is not a de Polignac number, because 1351140435261 - 2¹ = 1351140435259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351140635261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89635 + ... + 1646303.

It is an arithmetic number, because the mean of its divisors is an integer number (34744874400).

Almost surely, 2^{1351140435261} is an apocalyptic number.

It is an amenable number.

1351140435261 is a deficient number, since it is larger than the sum of its proper divisors (872531526339).

1351140435261 is a wasteful number, since it uses less digits than its factorization.

1351140435261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556787 (or 1556781 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 1351140435261 its reverse (1625340411531), we get a palindrome (2976480846792).

The spelling of 1351140435261 in words is "one trillion, three hundred fifty-one billion, one hundred forty million, four hundred thirty-five thousand, two hundred sixty-one".