427664526261 has 16 divisors (see below), whose sum is σ = 651693504000. Its totient is φ = 244374394608.

The previous prime is 427664526257. The next prime is 427664526269. The reversal of 427664526261 is 162625466724.

It is a happy number.

It is not a de Polignac number, because 427664526261 - 2² = 427664526257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427664526269) 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, 892690 + ... + 1285388.

It is an arithmetic number, because the mean of its divisors is an integer number (40730844000).

Almost surely, 2^427664526261 is an apocalyptic number.

It is an amenable number.

427664526261 is a deficient number, since it is larger than the sum of its proper divisors (224028977739).

427664526261 is a wasteful number, since it uses less digits than its factorization.

427664526261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444568.

The product of its digits is 5806080, while the sum is 51.

The spelling of 427664526261 in words is "four hundred twenty-seven billion, six hundred sixty-four million, five hundred twenty-six thousand, two hundred sixty-one".