61671769293 has 4 divisors (see below), whose sum is σ = 82229025728. Its totient is φ = 41114512860.

The previous prime is 61671769273. The next prime is 61671769321. The reversal of 61671769293 is 39296717616.

It is a happy number.

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 not a de Polignac number, because 61671769293 - 2⁸ = 61671769037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61671769273) 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, 10278628213 + ... + 10278628218.

It is an arithmetic number, because the mean of its divisors is an integer number (20557256432).

Almost surely, 2^61671769293 is an apocalyptic number.

It is an amenable number.

61671769293 is a deficient number, since it is larger than the sum of its proper divisors (20557256435).

61671769293 is a wasteful number, since it uses less digits than its factorization.

61671769293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20557256434.

The product of its digits is 5143824, while the sum is 57.

The spelling of 61671769293 in words is "sixty-one billion, six hundred seventy-one million, seven hundred sixty-nine thousand, two hundred ninety-three".