191281628833400 has 96 divisors (see below), whose sum is σ = 508296980795040. Its totient is φ = 65577838287360.

The previous prime is 191281628833277. The next prime is 191281628833417. The reversal of 191281628833400 is 4338826182191.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16126382 + ... + 25350018.

It is an arithmetic number, because the mean of its divisors is an integer number (5294760216615).

Almost surely, 2^{191281628833400} is an apocalyptic number.

191281628833400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191281628833400 is an abundant number, since it is smaller than the sum of its proper divisors (317015351961640).

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

191281628833400 is a wasteful number, since it uses less digits than its factorization.

191281628833400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9238473 (or 9238464 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 191281628833400 in words is "one hundred ninety-one trillion, two hundred eighty-one billion, six hundred twenty-eight million, eight hundred thirty-three thousand, four hundred".