1215808863051 has 16 divisors (see below), whose sum is σ = 1621904113440. Its totient is φ = 810126535680.

The previous prime is 1215808863013. The next prime is 1215808863107. The reversal of 1215808863051 is 1503688085121.

It is not a de Polignac number, because 1215808863051 - 2⁷ = 1215808862923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215808863251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79079601 + ... + 79094973.

It is an arithmetic number, because the mean of its divisors is an integer number (101369007090).

Almost surely, 2^{1215808863051} is an apocalyptic number.

1215808863051 is a deficient number, since it is larger than the sum of its proper divisors (406095250389).

1215808863051 is a wasteful number, since it uses less digits than its factorization.

1215808863051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27086.

The product of its (nonzero) digits is 460800, while the sum is 48.

The spelling of 1215808863051 in words is "one trillion, two hundred fifteen billion, eight hundred eight million, eight hundred sixty-three thousand, fifty-one".