37646336420 has 144 divisors (see below), whose sum is σ = 100434696768. Its totient is φ = 11721104640.

The previous prime is 37646336383. The next prime is 37646336423. The reversal of 37646336420 is 2463364673.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (37646336423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16416794 + ... + 16419086.

It is an arithmetic number, because the mean of its divisors is an integer number (697463172).

Almost surely, 2^37646336420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37646336420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50217348384).

37646336420 is an abundant number, since it is smaller than the sum of its proper divisors (62788360348).

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

37646336420 is a wasteful number, since it uses less digits than its factorization.

37646336420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850 (or 3841 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 44.

The spelling of 37646336420 in words is "thirty-seven billion, six hundred forty-six million, three hundred thirty-six thousand, four hundred twenty".