1355206312391 has 8 divisors (see below), whose sum is σ = 1365244658304. Its totient is φ = 1345181959800.

The previous prime is 1355206312331. The next prime is 1355206312393. The reversal of 1355206312391 is 1932136025531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1355206312391 - 2¹⁰ = 1355206311367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355206312393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3303881 + ... + 3691346.

It is an arithmetic number, because the mean of its divisors is an integer number (170655582288).

Almost surely, 2^{1355206312391} is an apocalyptic number.

1355206312391 is a deficient number, since it is larger than the sum of its proper divisors (10038345913).

1355206312391 is a wasteful number, since it uses less digits than its factorization.

1355206312391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996661.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 1355206312391 in words is "one trillion, three hundred fifty-five billion, two hundred six million, three hundred twelve thousand, three hundred ninety-one".