3642399637780 has 12 divisors (see below), whose sum is σ = 7649039239380. Its totient is φ = 1456959855104.

The previous prime is 3642399637741. The next prime is 3642399637787. The reversal of 3642399637780 is 877369932463.

It can be written as a sum of positive squares in 2 ways, for example, as 1767378807184 + 1875020830596 = 1329428^2 + 1369314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642399637787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91059990925 + ... + 91059990964.

It is an arithmetic number, because the mean of its divisors is an integer number (637419936615).

Almost surely, 2^{3642399637780} is an apocalyptic number.

It is an amenable number.

3642399637780 is an abundant number, since it is smaller than the sum of its proper divisors (4006639601600).

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

3642399637780 is a wasteful number, since it uses less digits than its factorization.

3642399637780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182119981898 (or 182119981896 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 67.

The spelling of 3642399637780 in words is "three trillion, six hundred forty-two billion, three hundred ninety-nine million, six hundred thirty-seven thousand, seven hundred eighty".