61402640320543 has 4 divisors (see below), whose sum is σ = 61403777607888. Its totient is φ = 61401503033200.

The previous prime is 61402640320531. The next prime is 61402640320559. The reversal of 61402640320543 is 34502304620416.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61402640320543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61402640320496 and 61402640320505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61402640320583) 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, 568562683 + ... + 568670668.

It is an arithmetic number, because the mean of its divisors is an integer number (15350944401972).

Almost surely, 2^{61402640320543} is an apocalyptic number.

61402640320543 is a deficient number, since it is larger than the sum of its proper divisors (1137287345).

61402640320543 is a wasteful number, since it uses less digits than its factorization.

61402640320543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137287344.

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 61402640320543 its reverse (34502304620416), we get a palindrome (95904944940959).

The spelling of 61402640320543 in words is "sixty-one trillion, four hundred two billion, six hundred forty million, three hundred twenty thousand, five hundred forty-three".