640405161350535 has 32 divisors (see below), whose sum is σ = 1171943594767872. Its totient is φ = 292527391685760.

The previous prime is 640405161350491. The next prime is 640405161350557. The reversal of 640405161350535 is 535053161504046.

640405161350535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640405161350535 - 2¹³ = 640405161342343 is a prime.

It is a congruent number.

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, 2387922601 + ... + 2388190770.

It is an arithmetic number, because the mean of its divisors is an integer number (36623237336496).

Almost surely, 2^{640405161350535} is an apocalyptic number.

640405161350535 is a deficient number, since it is larger than the sum of its proper divisors (531538433417337).

640405161350535 is a wasteful number, since it uses less digits than its factorization.

640405161350535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776114663.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 640405161350535 in words is "six hundred forty trillion, four hundred five billion, one hundred sixty-one million, three hundred fifty thousand, five hundred thirty-five".