1215426510172 has 48 divisors (see below), whose sum is σ = 2447308769472. Its totient is φ = 517376770560.

The previous prime is 1215426510167. The next prime is 1215426510247. The reversal of 1215426510172 is 2710156245121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4822848 + ... + 5068600.

It is an arithmetic number, because the mean of its divisors is an integer number (50985599364).

Almost surely, 2^{1215426510172} is an apocalyptic number.

It is an amenable number.

1215426510172 is an abundant number, since it is smaller than the sum of its proper divisors (1231882259300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215426510172 is a wasteful number, since it uses less digits than its factorization.

1215426510172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246958 (or 246956 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 1215426510172 in words is "one trillion, two hundred fifteen billion, four hundred twenty-six million, five hundred ten thousand, one hundred seventy-two".