22154005646451 has 24 divisors (see below), whose sum is σ = 36587683218944. Its totient is φ = 12653896327920.

The previous prime is 22154005646447. The next prime is 22154005646503. The reversal of 22154005646451 is 15464650045122.

22154005646451 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 40 + 0 + 564 + 6 + 45 + 1 = 666.

It is not a de Polignac number, because 22154005646451 - 2² = 22154005646447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22154005646397 and 22154005646406.

It is not an unprimeable number, because it can be changed into a prime (22154005648451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76736305 + ... + 77024466.

Almost surely, 2^{22154005646451} is an apocalyptic number.

22154005646451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22154005646451 is a deficient number, since it is larger than the sum of its proper divisors (14433677572493).

22154005646451 is a wasteful number, since it uses less digits than its factorization.

22154005646451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153763071 (or 153763068 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 22154005646451 in words is "twenty-two trillion, one hundred fifty-four billion, five million, six hundred forty-six thousand, four hundred fifty-one".