402640614006426 has 96 divisors (see below), whose sum is σ = 928370679350400. Its totient is φ = 125680606774272.

The previous prime is 402640614006383. The next prime is 402640614006461. The reversal of 402640614006426 is 624600416046204.

402640614006426 is a `hidden beast` number, since 4 + 0 + 2 + 6 + 4 + 0 + 614 + 0 + 0 + 6 + 4 + 26 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3597744246 + ... + 3597856158.

It is an arithmetic number, because the mean of its divisors is an integer number (9670527909900).

Almost surely, 2^{402640614006426} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402640614006426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464185339675200).

402640614006426 is an abundant number, since it is smaller than the sum of its proper divisors (525730065343974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402640614006426 is a wasteful number, since it uses less digits than its factorization.

402640614006426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171220 (or 171217 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 45.

The spelling of 402640614006426 in words is "four hundred two trillion, six hundred forty billion, six hundred fourteen million, six thousand, four hundred twenty-six".