640263014611337 has 4 divisors (see below), whose sum is σ = 689514015735300. Its totient is φ = 591012013487376.

The previous prime is 640263014611307. The next prime is 640263014611459. The reversal of 640263014611337 is 733116410362046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259470370151056 + 380792644460281 = 16108084^2 + 19513909^2 .

It is not a de Polignac number, because 640263014611337 - 2⁶ = 640263014611273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640263014611291 and 640263014611300.

It is not an unprimeable number, because it can be changed into a prime (640263014611307) 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, 24625500561962 + ... + 24625500561987.

It is an arithmetic number, because the mean of its divisors is an integer number (172378503933825).

Almost surely, 2^{640263014611337} is an apocalyptic number.

It is an amenable number.

640263014611337 is a deficient number, since it is larger than the sum of its proper divisors (49251001123963).

640263014611337 is a wasteful number, since it uses less digits than its factorization.

640263014611337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49251001123962.

The product of its (nonzero) digits is 1306368, while the sum is 47.

The spelling of 640263014611337 in words is "six hundred forty trillion, two hundred sixty-three billion, fourteen million, six hundred eleven thousand, three hundred thirty-seven".