913881253840 has 40 divisors (see below), whose sum is σ = 2236604124960. Its totient is φ = 346312895616.

The previous prime is 913881253837. The next prime is 913881253841. The reversal of 913881253840 is 48352188319.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×913881253840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913881253841) by changing a digit.

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, 300617314 + ... + 300620353.

It is an arithmetic number, because the mean of its divisors is an integer number (55915103124).

Almost surely, 2^913881253840 is an apocalyptic number.

It is an amenable number.

913881253840 is an abundant number, since it is smaller than the sum of its proper divisors (1322722871120).

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

913881253840 is a wasteful number, since it uses less digits than its factorization.

913881253840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601237699 (or 601237693 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 913881253840 in words is "nine hundred thirteen billion, eight hundred eighty-one million, two hundred fifty-three thousand, eight hundred forty".