19755647156 has 12 divisors (see below), whose sum is σ = 39511294368. Its totient is φ = 8466705912.

The previous prime is 19755647111. The next prime is 19755647189. The reversal of 19755647156 is 65174655791.

19755647156 is an admirable number.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352779386 + ... + 352779441.

It is an arithmetic number, because the mean of its divisors is an integer number (3292607864).

Almost surely, 2^19755647156 is an apocalyptic number.

It is an amenable number.

19755647156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19755647156 is a wasteful number, since it uses less digits than its factorization.

19755647156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705558838 (or 705558836 counting only the distinct ones).

The product of its digits is 7938000, while the sum is 56.

The spelling of 19755647156 in words is "nineteen billion, seven hundred fifty-five million, six hundred forty-seven thousand, one hundred fifty-six".