1215625127651 has 4 divisors (see below), whose sum is σ = 1326136502904. Its totient is φ = 1105113752400.

The previous prime is 1215625127581. The next prime is 1215625127669. The reversal of 1215625127651 is 1567215265121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215625127651 - 2¹⁰ = 1215625126627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215625127681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55255687610 + ... + 55255687631.

It is an arithmetic number, because the mean of its divisors is an integer number (331534125726).

Almost surely, 2^{1215625127651} is an apocalyptic number.

1215625127651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215625127651 is a deficient number, since it is larger than the sum of its proper divisors (110511375253).

1215625127651 is a wasteful number, since it uses less digits than its factorization.

1215625127651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110511375252.

The product of its digits is 252000, while the sum is 44.

The spelling of 1215625127651 in words is "one trillion, two hundred fifteen billion, six hundred twenty-five million, one hundred twenty-seven thousand, six hundred fifty-one".