1263492732920 has 64 divisors (see below), whose sum is σ = 3101425912800. Its totient is φ = 459433300480.

The previous prime is 1263492732893. The next prime is 1263492732977. The reversal of 1263492732920 is 292372943621.

It is a super-2 number, since 2×1263492732920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 15622346 + ... + 15703014.

Almost surely, 2^{1263492732920} is an apocalyptic number.

1263492732920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263492732920 is an abundant number, since it is smaller than the sum of its proper divisors (1837933179880).

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

1263492732920 is a wasteful number, since it uses less digits than its factorization.

1263492732920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116288 (or 116284 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 1263492732920 in words is "one trillion, two hundred sixty-three billion, four hundred ninety-two million, seven hundred thirty-two thousand, nine hundred twenty".