3790376778321 has 63 divisors (see below), whose sum is σ = 6611438377803. Its totient is φ = 2165719323600.

The previous prime is 3790376778289. The next prime is 3790376778323. The reversal of 3790376778321 is 1238776730973.

It is a happy number.

The square root of 3790376778321 is 1946889.

It is a perfect power (a square), and thus also a powerful number.

3790376778321 is a `hidden beast` number, since 37 + 90 + 376 + 77 + 83 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3644620809921 + 145755968400 = 1909089^2 + 381780^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 3790376778321 - 2⁵ = 3790376778289 is a prime.

It is a super-2 number, since 2×3790376778321² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (3790376778323) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 367956871 + ... + 367967171.

Almost surely, 2^{3790376778321} is an apocalyptic number.

3790376778321 is the 1946889-th square number.

3790376778321 is the 973445-th centered octagonal number.

It is an amenable number.

3790376778321 is a deficient number, since it is larger than the sum of its proper divisors (2821061599482).

3790376778321 is an frugal number, since it uses more digits than its factorization.

3790376778321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20634 (or 10311 counting only the distinct ones).

The product of its (nonzero) digits is 56010528, while the sum is 63.

The spelling of 3790376778321 in words is "three trillion, seven hundred ninety billion, three hundred seventy-six million, seven hundred seventy-eight thousand, three hundred twenty-one".