26621540546 has 4 divisors (see below), whose sum is σ = 39932310822. Its totient is φ = 13310770272.

The previous prime is 26621540521. The next prime is 26621540549. The reversal of 26621540546 is 64504512662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64504512662 = 2 ⋅32252256331.

It can be written as a sum of positive squares in only one way, i.e., 17945549521 + 8675991025 = 133961^2 + 93145^2 .

It is not an unprimeable number, because it can be changed into a prime (26621540549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6655385135 + ... + 6655385138.

Almost surely, 2^26621540546 is an apocalyptic number.

26621540546 is a deficient number, since it is larger than the sum of its proper divisors (13310770276).

26621540546 is a wasteful number, since it uses less digits than its factorization.

26621540546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310770275.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 26621540546 in words is "twenty-six billion, six hundred twenty-one million, five hundred forty thousand, five hundred forty-six".