190085771508 has 48 divisors (see below), whose sum is σ = 456210701184. Its totient is φ = 61556077440.

The previous prime is 190085771467. The next prime is 190085771509. The reversal of 190085771508 is 805177580091.

It is a super-2 number, since 2×190085771508² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190085771509) 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, 30360 + ... + 617327.

It is an arithmetic number, because the mean of its divisors is an integer number (9504389608).

Almost surely, 2^190085771508 is an apocalyptic number.

It is an amenable number.

190085771508 is an abundant number, since it is smaller than the sum of its proper divisors (266124929676).

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

190085771508 is a wasteful number, since it uses less digits than its factorization.

190085771508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648392 (or 648390 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 51.

The spelling of 190085771508 in words is "one hundred ninety billion, eighty-five million, seven hundred seventy-one thousand, five hundred eight".