1234563206551 has 8 divisors (see below), whose sum is σ = 1266529075344. Its totient is φ = 1202975632320.

The previous prime is 1234563206507. The next prime is 1234563206557. The reversal of 1234563206551 is 1556023654321.

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

It is a cyclic number.

It is not a de Polignac number, because 1234563206551 - 2⁹ = 1234563206039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234563206498 and 1234563206507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234563206557) 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, 94567030 + ... + 94580083.

It is an arithmetic number, because the mean of its divisors is an integer number (158316134418).

Almost surely, 2^{1234563206551} is an apocalyptic number.

1234563206551 is a deficient number, since it is larger than the sum of its proper divisors (31965868793).

1234563206551 is a wasteful number, since it uses less digits than its factorization.

1234563206551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189147281.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 1234563206551 in words is "one trillion, two hundred thirty-four billion, five hundred sixty-three million, two hundred six thousand, five hundred fifty-one".