163640642752 has 56 divisors (see below), whose sum is σ = 343177611840. Its totient is φ = 77205024000.

The previous prime is 163640642743. The next prime is 163640642761. The reversal of 163640642752 is 257246046361.

It is an interprime number because it is at equal distance from previous prime (163640642743) and next prime (163640642761).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 37143 + ... + 573289.

It is an arithmetic number, because the mean of its divisors is an integer number (6128171640).

Almost surely, 2^163640642752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163640642752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171588805920).

163640642752 is an abundant number, since it is smaller than the sum of its proper divisors (179536969088).

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

163640642752 is a wasteful number, since it uses less digits than its factorization.

163640642752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536429 (or 536419 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 163640642752 in words is "one hundred sixty-three billion, six hundred forty million, six hundred forty-two thousand, seven hundred fifty-two".