11951969750 has 48 divisors (see below), whose sum is σ = 26027026272. Its totient is φ = 4097814000.

The previous prime is 11951969747. The next prime is 11951969753. The reversal of 11951969750 is 5796915911.

It is an interprime number because it is at equal distance from previous prime (11951969747) and next prime (11951969753).

It is a junction number, because it is equal to n+sod(n) for n = 11951969692 and 11951969701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11951969753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475586 + ... + 500085.

It is an arithmetic number, because the mean of its divisors is an integer number (542229714).

Almost surely, 2^11951969750 is an apocalyptic number.

11951969750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11951969750 is an abundant number, since it is smaller than the sum of its proper divisors (14075056522).

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

11951969750 is an equidigital number, since it uses as much as digits as its factorization.

11951969750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975702 (or 975685 counting only the distinct ones).

The product of its (nonzero) digits is 765450, while the sum is 53.

The spelling of 11951969750 in words is "eleven billion, nine hundred fifty-one million, nine hundred sixty-nine thousand, seven hundred fifty".