402487845109 has 4 divisors (see below), whose sum is σ = 459986108704. Its totient is φ = 344989581516.

The previous prime is 402487845103. The next prime is 402487845127. The reversal of 402487845109 is 901548784204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402487845109 - 2³ = 402487845101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402487845101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28749131787 + ... + 28749131800.

It is an arithmetic number, because the mean of its divisors is an integer number (114996527176).

Almost surely, 2^402487845109 is an apocalyptic number.

It is an amenable number.

402487845109 is a deficient number, since it is larger than the sum of its proper divisors (57498263595).

402487845109 is an equidigital number, since it uses as much as digits as its factorization.

402487845109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57498263594.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 402487845109 in words is "four hundred two billion, four hundred eighty-seven million, eight hundred forty-five thousand, one hundred nine".