1263967157990 has 16 divisors (see below), whose sum is σ = 2275924657248. Its totient is φ = 505412691456.

The previous prime is 1263967157987. The next prime is 1263967158001. The reversal of 1263967157990 is 997517693621.

It is a super-2 number, since 2×1263967157990² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 21740987 + ... + 21799046.

It is an arithmetic number, because the mean of its divisors is an integer number (142245291078).

Almost surely, 2^{1263967157990} is an apocalyptic number.

1263967157990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263967157990 is a deficient number, since it is larger than the sum of its proper divisors (1011957499258).

1263967157990 is a wasteful number, since it uses less digits than its factorization.

1263967157990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43542943.

The product of its (nonzero) digits is 38578680, while the sum is 65.

The spelling of 1263967157990 in words is "one trillion, two hundred sixty-three billion, nine hundred sixty-seven million, one hundred fifty-seven thousand, nine hundred ninety".