2538861721386 has 16 divisors (see below), whose sum is σ = 5241520973568. Its totient is φ = 818987652000.

The previous prime is 2538861721381. The next prime is 2538861721399. The reversal of 2538861721386 is 6831271688352.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2538861721381) 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, 6824896915 + ... + 6824897286.

It is an arithmetic number, because the mean of its divisors is an integer number (327595060848).

Almost surely, 2^{2538861721386} is an apocalyptic number.

2538861721386 is an abundant number, since it is smaller than the sum of its proper divisors (2702659252182).

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

2538861721386 is a wasteful number, since it uses less digits than its factorization.

2538861721386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13649794237.

The product of its digits is 23224320, while the sum is 60.

The spelling of 2538861721386 in words is "two trillion, five hundred thirty-eight billion, eight hundred sixty-one million, seven hundred twenty-one thousand, three hundred eighty-six".