1263472939512 has 160 divisors (see below), whose sum is σ = 4050578711520. Its totient is φ = 360445282560.

The previous prime is 1263472939483. The next prime is 1263472939529. The reversal of 1263472939512 is 2159392743621.

It is a happy number.

1263472939512 is a `hidden beast` number, since 1 + 2 + 6 + 34 + 7 + 2 + 93 + 9 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2787598 + ... + 3208994.

It is an arithmetic number, because the mean of its divisors is an integer number (25316116947).

Almost surely, 2^{1263472939512} is an apocalyptic number.

1263472939512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263472939512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025289355760).

1263472939512 is an abundant number, since it is smaller than the sum of its proper divisors (2787105772008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263472939512 is a wasteful number, since it uses less digits than its factorization.

1263472939512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422083 (or 422070 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 1263472939512 in words is "one trillion, two hundred sixty-three billion, four hundred seventy-two million, nine hundred thirty-nine thousand, five hundred twelve".