1215808863052 has 24 divisors (see below), whose sum is σ = 2433504235680. Its totient is φ = 520656689280.

The previous prime is 1215808863013. The next prime is 1215808863107. The reversal of 1215808863052 is 2503688085121.

It is a junction number, because it is equal to n+sod(n) for n = 1215808862987 and 1215808863005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16807099 + ... + 16879282.

It is an arithmetic number, because the mean of its divisors is an integer number (101396009820).

Almost surely, 2^{1215808863052} is an apocalyptic number.

It is an amenable number.

1215808863052 is an abundant number, since it is smaller than the sum of its proper divisors (1217695372628).

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

1215808863052 is a wasteful number, since it uses less digits than its factorization.

1215808863052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33687681 (or 33687679 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 1215808863052 in words is "one trillion, two hundred fifteen billion, eight hundred eight million, eight hundred sixty-three thousand, fifty-two".