191018566452 has 24 divisors (see below), whose sum is σ = 509382844096. Its totient is φ = 54576733248.

The previous prime is 191018566433. The next prime is 191018566457. The reversal of 191018566452 is 254665810191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191018566457) 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, 1137015193 + ... + 1137015360.

Almost surely, 2^191018566452 is an apocalyptic number.

191018566452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191018566452 is an abundant number, since it is smaller than the sum of its proper divisors (318364277644).

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

191018566452 is a wasteful number, since it uses less digits than its factorization.

191018566452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274030567 (or 2274030565 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 191018566452 in words is "one hundred ninety-one billion, eighteen million, five hundred sixty-six thousand, four hundred fifty-two".