11691757390950 has 1152 divisors, whose sum is σ = 40304338523904. Its totient is φ = 2364899328000.

The previous prime is 11691757390919. The next prime is 11691757390969. The reversal of 11691757390950 is 5909375719611.

11691757390950 is a `hidden beast` number, since 1 + 1 + 6 + 9 + 1 + 7 + 573 + 9 + 0 + 9 + 50 = 666.

It is a super-2 number, since 2×11691757390950² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 17687983620 + ... + 17687984280.

Almost surely, 2^{11691757390950} is an apocalyptic number.

11691757390950 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 11691757390950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20152169261952).

11691757390950 is an abundant number, since it is smaller than the sum of its proper divisors (28612581132954).

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

11691757390950 is a wasteful number, since it uses less digits than its factorization.

11691757390950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 16074450, while the sum is 63.

The spelling of 11691757390950 in words is "eleven trillion, six hundred ninety-one billion, seven hundred fifty-seven million, three hundred ninety thousand, nine hundred fifty".