164028787890 has 64 divisors (see below), whose sum is σ = 448129262592. Its totient is φ = 38035659200.

The previous prime is 164028787889. The next prime is 164028787933. The reversal of 164028787890 is 98787820461.

It is a super-2 number, since 2×164028787890² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10797996 + ... + 10813175.

It is an arithmetic number, because the mean of its divisors is an integer number (7002019728).

Almost surely, 2^164028787890 is an apocalyptic number.

164028787890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164028787890 is an abundant number, since it is smaller than the sum of its proper divisors (284100474702).

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

164028787890 is a wasteful number, since it uses less digits than its factorization.

164028787890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21611215.

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 164028787890 in words is "one hundred sixty-four billion, twenty-eight million, seven hundred eighty-seven thousand, eight hundred ninety".