22406721501651 has 16 divisors (see below), whose sum is σ = 30185272734624. Its totient is φ = 14783009117184.

The previous prime is 22406721501649. The next prime is 22406721501679. The reversal of 22406721501651 is 15610512760422.

It is not a de Polignac number, because 22406721501651 - 2¹ = 22406721501649 is a prime.

It is a super-2 number, since 2×22406721501651² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22406721501601) 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, 3260821 + ... + 7446233.

It is an arithmetic number, because the mean of its divisors is an integer number (1886579545914).

Almost surely, 2^{22406721501651} is an apocalyptic number.

22406721501651 is a deficient number, since it is larger than the sum of its proper divisors (7778551232973).

22406721501651 is a wasteful number, since it uses less digits than its factorization.

22406721501651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203910.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 22406721501651 in words is "twenty-two trillion, four hundred six billion, seven hundred twenty-one million, five hundred one thousand, six hundred fifty-one".