16451111240 has 32 divisors (see below), whose sum is σ = 38963160000. Its totient is φ = 6234105024.

The previous prime is 16451111239. The next prime is 16451111249. The reversal of 16451111240 is 4211115461.

It is a super-2 number, since 2×16451111240² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16451111249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10822340 + ... + 10823859.

It is an arithmetic number, because the mean of its divisors is an integer number (1217598750).

Almost surely, 2^16451111240 is an apocalyptic number.

16451111240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16451111240 is an abundant number, since it is smaller than the sum of its proper divisors (22512048760).

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

16451111240 is a wasteful number, since it uses less digits than its factorization.

16451111240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21646229 (or 21646225 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The spelling of 16451111240 in words is "sixteen billion, four hundred fifty-one million, one hundred eleven thousand, two hundred forty".