21910770901659 has 16 divisors (see below), whose sum is σ = 29504055389184. Its totient is φ = 14462337852000.

The previous prime is 21910770901627. The next prime is 21910770901667. The reversal of 21910770901659 is 95610907701912.

It is a happy number.

It is not a de Polignac number, because 21910770901659 - 2⁵ = 21910770901627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21910770901599 and 21910770901608.

It is not an unprimeable number, because it can be changed into a prime (21910770901759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21085324 + ... + 22100054.

It is an arithmetic number, because the mean of its divisors is an integer number (1844003461824).

Almost surely, 2^{21910770901659} is an apocalyptic number.

21910770901659 is a deficient number, since it is larger than the sum of its proper divisors (7593284487525).

21910770901659 is a wasteful number, since it uses less digits than its factorization.

21910770901659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086098.

The product of its (nonzero) digits is 2143260, while the sum is 57.

The spelling of 21910770901659 in words is "twenty-one trillion, nine hundred ten billion, seven hundred seventy million, nine hundred one thousand, six hundred fifty-nine".