1553434900291 has 6 divisors (see below), whose sum is σ = 1567303781420. Its totient is φ = 1539687676128.

The previous prime is 1553434900273. The next prime is 1553434900313. The reversal of 1553434900291 is 1920094343551.

It is not a de Polignac number, because 1553434900291 - 2¹¹ = 1553434898243 is a prime.

It is a super-2 number, since 2×1553434900291² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553434900201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60815601 + ... + 60841138.

Almost surely, 2^{1553434900291} is an apocalyptic number.

1553434900291 is a deficient number, since it is larger than the sum of its proper divisors (13868881129).

1553434900291 is an equidigital number, since it uses as much as digits as its factorization.

1553434900291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121656965 (or 121656852 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 1553434900291 in words is "one trillion, five hundred fifty-three billion, four hundred thirty-four million, nine hundred thousand, two hundred ninety-one".