181079021490 has 32 divisors (see below), whose sum is σ = 434923788096. Its totient is φ = 48250612800.

The previous prime is 181079021471. The next prime is 181079021491. The reversal of 181079021490 is 94120970181.

It is a super-2 number, since 2×181079021490² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (181079021491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280712 + ... + 2358771.

It is an arithmetic number, because the mean of its divisors is an integer number (13591368378).

Almost surely, 2^181079021490 is an apocalyptic number.

181079021490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181079021490 is an abundant number, since it is smaller than the sum of its proper divisors (253844766606).

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

181079021490 is a wasteful number, since it uses less digits than its factorization.

181079021490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640794.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 181079021490 in words is "one hundred eighty-one billion, seventy-nine million, twenty-one thousand, four hundred ninety".