1938905164551 has 8 divisors (see below), whose sum is σ = 2623792063744. Its totient is φ = 1273310854200.

The previous prime is 1938905164523. The next prime is 1938905164577. The reversal of 1938905164551 is 1554615098391.

It is a happy number.

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

It is not a de Polignac number, because 1938905164551 - 2⁵ = 1938905164519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1938905164491 and 1938905164500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938905164501) 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, 4823146975 + ... + 4823147376.

It is an arithmetic number, because the mean of its divisors is an integer number (327974007968).

Almost surely, 2^{1938905164551} is an apocalyptic number.

1938905164551 is a deficient number, since it is larger than the sum of its proper divisors (684886899193).

1938905164551 is an equidigital number, since it uses as much as digits as its factorization.

1938905164551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9646294421.

The product of its (nonzero) digits is 5832000, while the sum is 57.

The spelling of 1938905164551 in words is "one trillion, nine hundred thirty-eight billion, nine hundred five million, one hundred sixty-four thousand, five hundred fifty-one".