189455492970 has 128 divisors (see below), whose sum is σ = 511505280000. Its totient is φ = 49896193536.

The previous prime is 189455492969. The next prime is 189455492999. The reversal of 189455492970 is 79294554981.

189455492970 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 55 + 492 + 97 + 0 = 666.

It is a super-3 number, since 3×189455492970³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189455492898 and 189455492907.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7274031 + ... + 7300029.

It is an arithmetic number, because the mean of its divisors is an integer number (3996135000).

Almost surely, 2^189455492970 is an apocalyptic number.

189455492970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189455492970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255752640000).

189455492970 is an abundant number, since it is smaller than the sum of its proper divisors (322049787030).

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

189455492970 is a wasteful number, since it uses less digits than its factorization.

189455492970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26349 (or 26343 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 189455492970 in words is "one hundred eighty-nine billion, four hundred fifty-five million, four hundred ninety-two thousand, nine hundred seventy".