1215948543790 has 32 divisors (see below), whose sum is σ = 2196578593440. Its totient is φ = 484630867584.

The previous prime is 1215948543781. The next prime is 1215948543851. The reversal of 1215948543790 is 973458495121.

It is a super-2 number, since 2×1215948543790² (a number of 25 digits) contains 22 as substring.

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, 17366332 + ... + 17436208.

It is an arithmetic number, because the mean of its divisors is an integer number (68643081045).

Almost surely, 2^{1215948543790} is an apocalyptic number.

1215948543790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215948543790 is a deficient number, since it is larger than the sum of its proper divisors (980630049650).

1215948543790 is a wasteful number, since it uses less digits than its factorization.

1215948543790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76116.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 1215948543790 in words is "one trillion, two hundred fifteen billion, nine hundred forty-eight million, five hundred forty-three thousand, seven hundred ninety".