21601142626 has 8 divisors (see below), whose sum is σ = 37030530240. Its totient is φ = 9257632548.

The previous prime is 21601142609. The next prime is 21601142657. The reversal of 21601142626 is 62624110612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771469366 + ... + 771469393.

It is an arithmetic number, because the mean of its divisors is an integer number (4628816280).

Almost surely, 2^21601142626 is an apocalyptic number.

21601142626 is a deficient number, since it is larger than the sum of its proper divisors (15429387614).

21601142626 is a wasteful number, since it uses less digits than its factorization.

21601142626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542938768.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21601142626 in words is "twenty-one billion, six hundred one million, one hundred forty-two thousand, six hundred twenty-six".