191938770426 has 16 divisors (see below), whose sum is σ = 413406582624. Its totient is φ = 59058083184.

The previous prime is 191938770403. The next prime is 191938770433. The reversal of 191938770426 is 624077839191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230376656 + ... + 1230376811.

It is an arithmetic number, because the mean of its divisors is an integer number (25837911414).

Almost surely, 2^191938770426 is an apocalyptic number.

191938770426 is an abundant number, since it is smaller than the sum of its proper divisors (221467812198).

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

191938770426 is a wasteful number, since it uses less digits than its factorization.

191938770426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460753485.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 191938770426 in words is "one hundred ninety-one billion, nine hundred thirty-eight million, seven hundred seventy thousand, four hundred twenty-six".