163951780652 has 48 divisors (see below), whose sum is σ = 313670841120. Its totient is φ = 74363750400.

The previous prime is 163951780621. The next prime is 163951780661. The reversal of 163951780652 is 256087159361.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 163951780594 and 163951780603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53912252 + ... + 53915292.

It is an arithmetic number, because the mean of its divisors is an integer number (6534809190).

Almost surely, 2^163951780652 is an apocalyptic number.

It is an amenable number.

163951780652 is a deficient number, since it is larger than the sum of its proper divisors (149719060468).

163951780652 is a wasteful number, since it uses less digits than its factorization.

163951780652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282 (or 5280 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 163951780652 in words is "one hundred sixty-three billion, nine hundred fifty-one million, seven hundred eighty thousand, six hundred fifty-two".