11981705514 has 32 divisors (see below), whose sum is σ = 25248098304. Its totient is φ = 3783159600.

The previous prime is 11981705507. The next prime is 11981705543. The reversal of 11981705514 is 41550718911.

It is a super-2 number, since 2×11981705514² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407262 + ... + 435689.

It is an arithmetic number, because the mean of its divisors is an integer number (789003072).

Almost surely, 2^11981705514 is an apocalyptic number.

11981705514 is an abundant number, since it is smaller than the sum of its proper divisors (13266392790).

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

11981705514 is a wasteful number, since it uses less digits than its factorization.

11981705514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843082.

The product of its (nonzero) digits is 50400, while the sum is 42.

The spelling of 11981705514 in words is "eleven billion, nine hundred eighty-one million, seven hundred five thousand, five hundred fourteen".