191063551985475 has 96 divisors (see below), whose sum is σ = 340569896339904. Its totient is φ = 93957348556800.

The previous prime is 191063551985473. The next prime is 191063551985503. The reversal of 191063551985475 is 574589155360191.

191063551985475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 13822574²-1.

It is not a de Polignac number, because 191063551985475 - 2¹ = 191063551985473 is a prime.

It is a super-2 number, since 2×191063551985475² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191063551985473) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13477001587 + ... + 13477015763.

It is an arithmetic number, because the mean of its divisors is an integer number (3547603086874).

Almost surely, 2^{191063551985475} is an apocalyptic number.

191063551985475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

191063551985475 is a deficient number, since it is larger than the sum of its proper divisors (149506344354429).

191063551985475 is a wasteful number, since it uses less digits than its factorization.

191063551985475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617 (or 28612 counting only the distinct ones).

The product of its (nonzero) digits is 204120000, while the sum is 69.

The spelling of 191063551985475 in words is "one hundred ninety-one trillion, sixty-three billion, five hundred fifty-one million, nine hundred eighty-five thousand, four hundred seventy-five".