61432453643 has 16 divisors (see below), whose sum is σ = 69220580352. Its totient is φ = 54013716000.

The previous prime is 61432453639. The next prime is 61432453679. The reversal of 61432453643 is 34635423416.

61432453643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61432453643 - 2² = 61432453639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61432453643.

It is not an unprimeable number, because it can be changed into a prime (61432453633) 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, 524108 + ... + 630518.

It is an arithmetic number, because the mean of its divisors is an integer number (4326286272).

Almost surely, 2^61432453643 is an apocalyptic number.

61432453643 is a deficient number, since it is larger than the sum of its proper divisors (7788126709).

61432453643 is a wasteful number, since it uses less digits than its factorization.

61432453643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108146.

The product of its digits is 622080, while the sum is 41.

The spelling of 61432453643 in words is "sixty-one billion, four hundred thirty-two million, four hundred fifty-three thousand, six hundred forty-three".