14661561420 has 72 divisors (see below), whose sum is σ = 48516446160. Its totient is φ = 3554317440.

The previous prime is 14661561391. The next prime is 14661561433. The reversal of 14661561420 is 2416516641.

14661561420 is a `hidden beast` number, since 1 + 4 + 6 + 6 + 15 + 614 + 20 = 666.

It is a super-2 number, since 2×14661561420² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3700435 + ... + 3704394.

It is an arithmetic number, because the mean of its divisors is an integer number (673839530).

Almost surely, 2^14661561420 is an apocalyptic number.

14661561420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14661561420 is an abundant number, since it is smaller than the sum of its proper divisors (33854884740).

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

14661561420 is a wasteful number, since it uses less digits than its factorization.

14661561420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404855 (or 7404850 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

It can be divided in two parts, 14661 and 561420, that added together give a square (576081 = 759²).

The spelling of 14661561420 in words is "fourteen billion, six hundred sixty-one million, five hundred sixty-one thousand, four hundred twenty".