1254163890040 has 32 divisors (see below), whose sum is σ = 2821940473680. Its totient is φ = 501652805632.

The previous prime is 1254163889977. The next prime is 1254163890071. The reversal of 1254163890040 is 400983614521.

It is a super-2 number, since 2×1254163890040² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282584 + ... + 2037976.

Almost surely, 2^{1254163890040} is an apocalyptic number.

1254163890040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1254163890040 is an abundant number, since it is smaller than the sum of its proper divisors (1567776583640).

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

1254163890040 is a wasteful number, since it uses less digits than its factorization.

1254163890040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796911 (or 796907 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 1254163890040 in words is "one trillion, two hundred fifty-four billion, one hundred sixty-three million, eight hundred ninety thousand, forty".