640545242201445 has 64 divisors (see below), whose sum is σ = 1177196195635200. Its totient is φ = 291344209648128.

The previous prime is 640545242201411. The next prime is 640545242201479. The reversal of 640545242201445 is 544102242545046.

It is an interprime number because it is at equal distance from previous prime (640545242201411) and next prime (640545242201479).

It is not a de Polignac number, because 640545242201445 - 2¹⁴ = 640545242185061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640545242201394 and 640545242201403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22599906 + ... + 42330204.

It is an arithmetic number, because the mean of its divisors is an integer number (18393690556800).

Almost surely, 2^{640545242201445} is an apocalyptic number.

It is an amenable number.

640545242201445 is a deficient number, since it is larger than the sum of its proper divisors (536650953433755).

640545242201445 is a wasteful number, since it uses less digits than its factorization.

640545242201445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731874.

The product of its (nonzero) digits is 6144000, while the sum is 48.

The spelling of 640545242201445 in words is "six hundred forty trillion, five hundred forty-five billion, two hundred forty-two million, two hundred one thousand, four hundred forty-five".