643061262435 has 16 divisors (see below), whose sum is σ = 1053993094560. Its totient is φ = 334600981760.

The previous prime is 643061262433. The next prime is 643061262463. The reversal of 643061262435 is 534262160346.

It is a happy number.

It is not a de Polignac number, because 643061262435 - 2¹ = 643061262433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643061262433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522813420 + ... + 522814649.

It is an arithmetic number, because the mean of its divisors is an integer number (65874568410).

Almost surely, 2^643061262435 is an apocalyptic number.

643061262435 is a deficient number, since it is larger than the sum of its proper divisors (410931832125).

643061262435 is a wasteful number, since it uses less digits than its factorization.

643061262435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045628118.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 643061262435 in words is "six hundred forty-three billion, sixty-one million, two hundred sixty-two thousand, four hundred thirty-five".