1215438157120 has 112 divisors (see below), whose sum is σ = 3162533159808. Its totient is φ = 441255720960.

The previous prime is 1215438157067. The next prime is 1215438157183. The reversal of 1215438157120 is 217518345121.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 1876117 + ... + 2439403.

Almost surely, 2^{1215438157120} is an apocalyptic number.

1215438157120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215438157120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581266579904).

1215438157120 is an abundant number, since it is smaller than the sum of its proper divisors (1947095002688).

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

1215438157120 is a wasteful number, since it uses less digits than its factorization.

1215438157120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563928 (or 563918 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 1215438157120 in words is "one trillion, two hundred fifteen billion, four hundred thirty-eight million, one hundred fifty-seven thousand, one hundred twenty".