1378038862201 has 9 divisors (see below), whose sum is σ = 1416334399599. Its totient is φ = 1340752308264.

The previous prime is 1378038862199. The next prime is 1378038862217. The reversal of 1378038862201 is 1022688308731.

The square root of 1378038862201 is 1173899.

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

It can be written as a sum of positive squares in only one way, i.e., 1233088098025 + 144950764176 = 1110445^2 + 380724^2 .

It is not a de Polignac number, because 1378038862201 - 2¹ = 1378038862199 is a prime.

It is a super-2 number, since 2×1378038862201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378038862241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 43418400 + ... + 43450126.

Almost surely, 2^{1378038862201} is an apocalyptic number.

1378038862201 is the 1173899-th square number.

1378038862201 is the 586950-th centered octagonal number.

It is an amenable number.

1378038862201 is a deficient number, since it is larger than the sum of its proper divisors (38295537398).

1378038862201 is an frugal number, since it uses more digits than its factorization.

1378038862201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63528 (or 31764 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

Multiplying 1378038862201 by its sum of digits (49), we get a square (67523904247849 = 8217293²).

The spelling of 1378038862201 in words is "one trillion, three hundred seventy-eight billion, thirty-eight million, eight hundred sixty-two thousand, two hundred one".