3644877438420 has 24 divisors (see below), whose sum is σ = 10205656827744. Its totient is φ = 971967316896.

The previous prime is 3644877438409. The next prime is 3644877438431. The reversal of 3644877438420 is 248347784463.

It is an interprime number because it is at equal distance from previous prime (3644877438409) and next prime (3644877438431).

It is a super-2 number, since 2×3644877438420² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 60747957307 = 3644877438420 / (3 + 6 + 4 + 4 + 8 + 7 + 7 + 4 + 3 + 8 + 4 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30373978594 + ... + 30373978713.

It is an arithmetic number, because the mean of its divisors is an integer number (425235701156).

Almost surely, 2^{3644877438420} is an apocalyptic number.

3644877438420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3644877438420 is an abundant number, since it is smaller than the sum of its proper divisors (6560779389324).

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

3644877438420 is a wasteful number, since it uses less digits than its factorization.

3644877438420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60747957319 (or 60747957317 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 60.

The spelling of 3644877438420 in words is "three trillion, six hundred forty-four billion, eight hundred seventy-seven million, four hundred thirty-eight thousand, four hundred twenty".