4213661520 has 80 divisors (see below), whose sum is σ = 13178031552. Its totient is φ = 1113692160.

The previous prime is 4213661509. The next prime is 4213661527. The reversal of 4213661520 is 251663124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4213661527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50566 + ... + 104805.

Almost surely, 2^4213661520 is an apocalyptic number.

4213661520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4213661520 is an abundant number, since it is smaller than the sum of its proper divisors (8964370032).

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

4213661520 is a wasteful number, since it uses less digits than its factorization.

4213661520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155500 (or 155494 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 4213661520 is about 64912.7223277533. The cubic root of 4213661520 is about 1615.1761088774.

The spelling of 4213661520 in words is "four billion, two hundred thirteen million, six hundred sixty-one thousand, five hundred twenty".