191009780130 has 192 divisors, whose sum is σ = 519167819520. Its totient is φ = 44676914688.

The previous prime is 191009780107. The next prime is 191009780153. The reversal of 191009780130 is 31087900191.

It is an interprime number because it is at equal distance from previous prime (191009780107) and next prime (191009780153).

It is a super-2 number, since 2×191009780130² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26677491 + ... + 26684649.

It is an arithmetic number, because the mean of its divisors is an integer number (2703999060).

Almost surely, 2^191009780130 is an apocalyptic number.

191009780130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 191009780130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259583909760).

191009780130 is an abundant number, since it is smaller than the sum of its proper divisors (328158039390).

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

191009780130 is a wasteful number, since it uses less digits than its factorization.

191009780130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7305 (or 7262 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 39.

The spelling of 191009780130 in words is "one hundred ninety-one billion, nine million, seven hundred eighty thousand, one hundred thirty".