640525363525046 has 8 divisors (see below), whose sum is σ = 962340206913480. Its totient is φ = 319745294553888.

The previous prime is 640525363525037. The next prime is 640525363525063.

640525363525046 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×640525363525046³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640525363524982 and 640525363525000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258693602771 + ... + 258693605246.

It is an arithmetic number, because the mean of its divisors is an integer number (120292525864185).

Almost surely, 2^{640525363525046} is an apocalyptic number.

640525363525046 is a deficient number, since it is larger than the sum of its proper divisors (321814843388434).

640525363525046 is a wasteful number, since it uses less digits than its factorization.

640525363525046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517387208638.

The product of its (nonzero) digits is 77760000, while the sum is 56.

The spelling of 640525363525046 in words is "six hundred forty trillion, five hundred twenty-five billion, three hundred sixty-three million, five hundred twenty-five thousand, forty-six".