61912425543 has 4 divisors (see below), whose sum is σ = 82549900728. Its totient is φ = 41274950360.

The previous prime is 61912425541. The next prime is 61912425557. The reversal of 61912425543 is 34552421916.

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

It is a cyclic number.

It is not a de Polignac number, because 61912425543 - 2¹ = 61912425541 is a prime.

It is a super-3 number, since 3×61912425543³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61912425495 and 61912425504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61912425541) 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, 10318737588 + ... + 10318737593.

It is an arithmetic number, because the mean of its divisors is an integer number (20637475182).

Almost surely, 2^61912425543 is an apocalyptic number.

61912425543 is a deficient number, since it is larger than the sum of its proper divisors (20637475185).

61912425543 is a wasteful number, since it uses less digits than its factorization.

61912425543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20637475184.

The product of its digits is 259200, while the sum is 42.

The spelling of 61912425543 in words is "sixty-one billion, nine hundred twelve million, four hundred twenty-five thousand, five hundred forty-three".