640115420035 has 32 divisors (see below), whose sum is σ = 995159208960. Its totient is φ = 383847113088.

The previous prime is 640115420003. The next prime is 640115420059. The reversal of 640115420035 is 530024511046.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 640115420035 - 2⁵ = 640115420003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640115419979 and 640115420006.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37013647 + ... + 37030936.

It is an arithmetic number, because the mean of its divisors is an integer number (31098725280).

Almost surely, 2^640115420035 is an apocalyptic number.

640115420035 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

640115420035 is a deficient number, since it is larger than the sum of its proper divisors (355043788925).

640115420035 is a wasteful number, since it uses less digits than its factorization.

640115420035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74044627.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 640115420035 in words is "six hundred forty billion, one hundred fifteen million, four hundred twenty thousand, thirty-five".