1215620632155 has 8 divisors (see below), whose sum is σ = 1944993011472. Its totient is φ = 648331003808.

The previous prime is 1215620632147. The next prime is 1215620632169. The reversal of 1215620632155 is 5512360265121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215620632155 - 2³ = 1215620632147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40520687724 + ... + 40520687753.

It is an arithmetic number, because the mean of its divisors is an integer number (243124126434).

Almost surely, 2^{1215620632155} is an apocalyptic number.

1215620632155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215620632155 is a deficient number, since it is larger than the sum of its proper divisors (729372379317).

1215620632155 is an equidigital number, since it uses as much as digits as its factorization.

1215620632155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81041375485.

The product of its (nonzero) digits is 108000, while the sum is 39.

Adding to 1215620632155 its reverse (5512360265121), we get a palindrome (6727980897276).

The spelling of 1215620632155 in words is "one trillion, two hundred fifteen billion, six hundred twenty million, six hundred thirty-two thousand, one hundred fifty-five".