1234561527551 has 6 divisors (see below), whose sum is σ = 1356997381656. Its totient is φ = 1122328661300.

The previous prime is 1234561527517. The next prime is 1234561527571. The reversal of 1234561527551 is 1557251654321.

It is not a de Polignac number, because 1234561527551 - 2⁶ = 1234561527487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234561527496 and 1234561527505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234561527571) 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, 5101493795 + ... + 5101494036.

It is an arithmetic number, because the mean of its divisors is an integer number (226166230276).

Almost surely, 2^{1234561527551} is an apocalyptic number.

1234561527551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1234561527551 is a deficient number, since it is larger than the sum of its proper divisors (122435854105).

1234561527551 is a wasteful number, since it uses less digits than its factorization.

1234561527551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202987853 (or 10202987842 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 47.

The spelling of 1234561527551 in words is "one trillion, two hundred thirty-four billion, five hundred sixty-one million, five hundred twenty-seven thousand, five hundred fifty-one".