1938648687361 has 8 divisors (see below), whose sum is σ = 2001224977664. Its totient is φ = 1876074849360.

The previous prime is 1938648687337. The next prime is 1938648687419. The reversal of 1938648687361 is 1637868468391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1938648687361 - 2¹³ = 1938648679169 is a prime.

It is a super-2 number, since 2×1938648687361² (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 (1938648687301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066615 + ... + 2239411.

It is an arithmetic number, because the mean of its divisors is an integer number (250153122208).

Almost surely, 2^{1938648687361} is an apocalyptic number.

It is an amenable number.

1938648687361 is a deficient number, since it is larger than the sum of its proper divisors (62576290303).

1938648687361 is a wasteful number, since it uses less digits than its factorization.

1938648687361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226151.

The product of its digits is 250822656, while the sum is 70.

The spelling of 1938648687361 in words is "one trillion, nine hundred thirty-eight billion, six hundred forty-eight million, six hundred eighty-seven thousand, three hundred sixty-one".