21772605137601 has 8 divisors (see below), whose sum is σ = 29044171192320. Its totient is φ = 14508054587312.

The previous prime is 21772605137593. The next prime is 21772605137639. The reversal of 21772605137601 is 10673150627712.

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

It is a cyclic number.

It is not a de Polignac number, because 21772605137601 - 2³ = 21772605137593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21772605137651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753868865 + ... + 1753881278.

It is an arithmetic number, because the mean of its divisors is an integer number (3630521399040).

Almost surely, 2^{21772605137601} is an apocalyptic number.

It is an amenable number.

21772605137601 is a deficient number, since it is larger than the sum of its proper divisors (7271566054719).

21772605137601 is a wasteful number, since it uses less digits than its factorization.

21772605137601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507752215.

The product of its (nonzero) digits is 740880, while the sum is 48.

The spelling of 21772605137601 in words is "twenty-one trillion, seven hundred seventy-two billion, six hundred five million, one hundred thirty-seven thousand, six hundred one".