13949101640 has 32 divisors (see below), whose sum is σ = 32750066880. Its totient is φ = 5337047232.

The previous prime is 13949101619. The next prime is 13949101643. The reversal of 13949101640 is 4610194931.

It is a junction number, because it is equal to n+sod(n) for n = 13949101594 and 13949101603.

It is not an unprimeable number, because it can be changed into a prime (13949101643) 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, 7580114 + ... + 7581953.

It is an arithmetic number, because the mean of its divisors is an integer number (1023439590).

Almost surely, 2^13949101640 is an apocalyptic number.

13949101640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13949101640 is an abundant number, since it is smaller than the sum of its proper divisors (18800965240).

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

13949101640 is a wasteful number, since it uses less digits than its factorization.

13949101640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15162101 (or 15162097 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 13949101640 in words is "thirteen billion, nine hundred forty-nine million, one hundred one thousand, six hundred forty".