1626536542 has 4 divisors (see below), whose sum is σ = 2439804816. Its totient is φ = 813268270.

The previous prime is 1626536537. The next prime is 1626536573. The reversal of 1626536542 is 2456356261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2456356261 = 1109 ⋅2214929.

It is a super-2 number, since 2×1626536542² = 5291242244922635528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1626536495 and 1626536504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406634134 + ... + 406634137.

It is an arithmetic number, because the mean of its divisors is an integer number (609951204).

Almost surely, 2^1626536542 is an apocalyptic number.

1626536542 is a deficient number, since it is larger than the sum of its proper divisors (813268274).

1626536542 is an equidigital number, since it uses as much as digits as its factorization.

1626536542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813268273.

The product of its digits is 259200, while the sum is 40.

The square root of 1626536542 is about 40330.3426962876. The cubic root of 1626536542 is about 1176.0377834861.

The spelling of 1626536542 in words is "one billion, six hundred twenty-six million, five hundred thirty-six thousand, five hundred forty-two".