402771055128 has 64 divisors (see below), whose sum is σ = 1085434220640. Its totient is φ = 123809485824.

The previous prime is 402771055121. The next prime is 402771055147. The reversal of 402771055128 is 821550177204.

It is a self number, because there is not a number n which added to its sum of digits gives 402771055128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402771055121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302551 + ... + 947142.

Almost surely, 2^402771055128 is an apocalyptic number.

It is an amenable number.

402771055128 is an abundant number, since it is smaller than the sum of its proper divisors (682663165512).

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

402771055128 is a wasteful number, since it uses less digits than its factorization.

402771055128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250748 (or 1250744 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 402771055128 in words is "four hundred two billion, seven hundred seventy-one million, fifty-five thousand, one hundred twenty-eight".