15643955028040 has 32 divisors (see below), whose sum is σ = 35622981938880. Its totient is φ = 6182189455552.

The previous prime is 15643955027999. The next prime is 15643955028077. The reversal of 15643955028040 is 4082055934651.

It is a happy 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, 2356014004 + ... + 2356020643.

It is an arithmetic number, because the mean of its divisors is an integer number (1113218185590).

Almost surely, 2^{15643955028040} is an apocalyptic number.

15643955028040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15643955028040 is an abundant number, since it is smaller than the sum of its proper divisors (19979026910840).

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

15643955028040 is a wasteful number, since it uses less digits than its factorization.

15643955028040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712034741 (or 4712034737 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 15643955028040 in words is "fifteen trillion, six hundred forty-three billion, nine hundred fifty-five million, twenty-eight thousand, forty".