61712733737 has 4 divisors (see below), whose sum is σ = 61730234496. Its totient is φ = 61695232980.

The previous prime is 61712733703. The next prime is 61712733739. The reversal of 61712733737 is 73733721716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61712733737 - 2⁶ = 61712733673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61712733691 and 61712733700.

It is not an unprimeable number, because it can be changed into a prime (61712733739) 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, 8745089 + ... + 8752142.

It is an arithmetic number, because the mean of its divisors is an integer number (15432558624).

Almost surely, 2^61712733737 is an apocalyptic number.

It is an amenable number.

61712733737 is a deficient number, since it is larger than the sum of its proper divisors (17500759).

61712733737 is a wasteful number, since it uses less digits than its factorization.

61712733737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500758.

The product of its digits is 777924, while the sum is 47.

The spelling of 61712733737 in words is "sixty-one billion, seven hundred twelve million, seven hundred thirty-three thousand, seven hundred thirty-seven".