26691691630 has 32 divisors (see below), whose sum is σ = 48397759200. Its totient is φ = 10598386560.

The previous prime is 26691691597. The next prime is 26691691643. The reversal of 26691691630 is 3619619662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2872552 + ... + 2881828.

It is an arithmetic number, because the mean of its divisors is an integer number (1512429975).

Almost surely, 2^26691691630 is an apocalyptic number.

26691691630 is a deficient number, since it is larger than the sum of its proper divisors (21706067570).

26691691630 is a wasteful number, since it uses less digits than its factorization.

26691691630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 26691691630 in words is "twenty-six billion, six hundred ninety-one million, six hundred ninety-one thousand, six hundred thirty".