61680153743 has 4 divisors (see below), whose sum is σ = 66424780968. Its totient is φ = 56935526520.

The previous prime is 61680153709. The next prime is 61680153767. The reversal of 61680153743 is 34735108616.

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 61680153743 - 2²⁶ = 61613044879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61680153694 and 61680153703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61680153793) 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, 2372313593 + ... + 2372313618.

It is an arithmetic number, because the mean of its divisors is an integer number (16606195242).

Almost surely, 2^61680153743 is an apocalyptic number.

61680153743 is a deficient number, since it is larger than the sum of its proper divisors (4744627225).

61680153743 is a wasteful number, since it uses less digits than its factorization.

61680153743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744627224.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 61680153743 in words is "sixty-one billion, six hundred eighty million, one hundred fifty-three thousand, seven hundred forty-three".