189511337890 has 16 divisors (see below), whose sum is σ = 389851895232. Its totient is φ = 64975315824.

The previous prime is 189511337863. The next prime is 189511337891. The reversal of 189511337890 is 98733115981.

It is not an unprimeable number, because it can be changed into a prime (189511337891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353652344 + ... + 1353652483.

It is an arithmetic number, because the mean of its divisors is an integer number (24365743452).

Almost surely, 2^189511337890 is an apocalyptic number.

189511337890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189511337890 is an abundant number, since it is smaller than the sum of its proper divisors (200340557342).

189511337890 is a wasteful number, since it uses less digits than its factorization.

189511337890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707304841.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 189511337890 in words is "one hundred eighty-nine billion, five hundred eleven million, three hundred thirty-seven thousand, eight hundred ninety".