1215048769440 has 768 divisors, whose sum is σ = 4395377032704. Its totient is φ = 279530700800.

The previous prime is 1215048769433. The next prime is 1215048769457. The reversal of 1215048769440 is 449678405121.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1571860894 + ... + 1571861666.

It is an arithmetic number, because the mean of its divisors is an integer number (5723147178).

Almost surely, 2^{1215048769440} is an apocalyptic number.

1215048769440 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 1215048769440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2197688516352).

1215048769440 is an abundant number, since it is smaller than the sum of its proper divisors (3180328263264).

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

1215048769440 is a wasteful number, since it uses less digits than its factorization.

1215048769440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 1215048769440 in words is "one trillion, two hundred fifteen billion, forty-eight million, seven hundred sixty-nine thousand, four hundred forty".