402426156561 has 64 divisors (see below), whose sum is σ = 645310009344. Its totient is φ = 219803673600.

The previous prime is 402426156521. The next prime is 402426156563. The reversal of 402426156561 is 165651624204.

It is not a de Polignac number, because 402426156561 - 2¹⁴ = 402426140177 is a prime.

It is a super-2 number, since 2×402426156561² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402426156563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84134376 + ... + 84139158.

It is an arithmetic number, because the mean of its divisors is an integer number (10082968896).

Almost surely, 2^402426156561 is an apocalyptic number.

It is an amenable number.

402426156561 is a deficient number, since it is larger than the sum of its proper divisors (242883852783).

402426156561 is a wasteful number, since it uses less digits than its factorization.

402426156561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 402426156561 in words is "four hundred two billion, four hundred twenty-six million, one hundred fifty-six thousand, five hundred sixty-one".