1215149514491 has 12 divisors (see below), whose sum is σ = 1335878455296. Its totient is φ = 1104500873520.

The previous prime is 1215149514463. The next prime is 1215149514493. The reversal of 1215149514491 is 1944159415121.

It is not a de Polignac number, because 1215149514491 - 2¹⁰ = 1215149513467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215149514493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74096 + ... + 1560701.

It is an arithmetic number, because the mean of its divisors is an integer number (111323204608).

Almost surely, 2^{1215149514491} is an apocalyptic number.

1215149514491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215149514491 is a deficient number, since it is larger than the sum of its proper divisors (120728940805).

1215149514491 is a wasteful number, since it uses less digits than its factorization.

1215149514491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640962 (or 1640951 counting only the distinct ones).

The product of its digits is 259200, while the sum is 47.

The spelling of 1215149514491 in words is "one trillion, two hundred fifteen billion, one hundred forty-nine million, five hundred fourteen thousand, four hundred ninety-one".