189653379840 has 216 divisors, whose sum is σ = 664090081200. Its totient is φ = 49964654592.

The previous prime is 189653379809. The next prime is 189653379871. The reversal of 189653379840 is 48973356981.

189653379840 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 533 + 7 + 98 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (189653379809) and next prime (189653379871).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 856986 + ... + 1055334.

Almost surely, 2^189653379840 is an apocalyptic number.

189653379840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189653379840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332045040600).

189653379840 is an abundant number, since it is smaller than the sum of its proper divisors (474436701360).

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

189653379840 is a wasteful number, since it uses less digits than its factorization.

189653379840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198459 (or 198442 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 189653379840 in words is "one hundred eighty-nine billion, six hundred fifty-three million, three hundred seventy-nine thousand, eight hundred forty".