427765537640 has 64 divisors (see below), whose sum is σ = 1120722687360. Its totient is φ = 143895248640.

The previous prime is 427765537631. The next prime is 427765537643. The reversal of 427765537640 is 46735567724.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (427765537643) 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, 14397746 + ... + 14427425.

It is an arithmetic number, because the mean of its divisors is an integer number (17511291990).

Almost surely, 2^427765537640 is an apocalyptic number.

427765537640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

427765537640 is an abundant number, since it is smaller than the sum of its proper divisors (692957149720).

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

427765537640 is a wasteful number, since it uses less digits than its factorization.

427765537640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28825242 (or 28825238 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 56.

The spelling of 427765537640 in words is "four hundred twenty-seven billion, seven hundred sixty-five million, five hundred thirty-seven thousand, six hundred forty".