1212963243615 has 24 divisors (see below), whose sum is σ = 2112433949808. Its totient is φ = 643847783040.

The previous prime is 1212963243599. The next prime is 1212963243647. The reversal of 1212963243615 is 5163423692121.

1212963243615 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 9 + 6 + 3 + 24 + 3 + 615 = 666.

It is not a de Polignac number, because 1212963243615 - 2⁴ = 1212963243599 is a prime.

It is a super-2 number, since 2×1212963243615² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63864294 + ... + 63883283.

It is an arithmetic number, because the mean of its divisors is an integer number (88018081242).

Almost surely, 2^{1212963243615} is an apocalyptic number.

1212963243615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1212963243615 is a deficient number, since it is larger than the sum of its proper divisors (899470706193).

1212963243615 is a wasteful number, since it uses less digits than its factorization.

1212963243615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127747799 (or 127747796 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 1212963243615 in words is "one trillion, two hundred twelve billion, nine hundred sixty-three million, two hundred forty-three thousand, six hundred fifteen".