1538536627769 has 4 divisors (see below), whose sum is σ = 1588166841600. Its totient is φ = 1488906413940.

The previous prime is 1538536627763. The next prime is 1538536627801. The reversal of 1538536627769 is 9677266358351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1538536627769 - 2⁸ = 1538536627513 is a prime.

It is a super-2 number, since 2×1538536627769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1538536627699 and 1538536627708.

It is not an unprimeable number, because it can be changed into a prime (1538536627763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24815106869 + ... + 24815106930.

It is an arithmetic number, because the mean of its divisors is an integer number (397041710400).

Almost surely, 2^{1538536627769} is an apocalyptic number.

It is an amenable number.

1538536627769 is a deficient number, since it is larger than the sum of its proper divisors (49630213831).

1538536627769 is an equidigital number, since it uses as much as digits as its factorization.

1538536627769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49630213830.

The product of its digits is 342921600, while the sum is 68.

The spelling of 1538536627769 in words is "one trillion, five hundred thirty-eight billion, five hundred thirty-six million, six hundred twenty-seven thousand, seven hundred sixty-nine".