61562991677 has 8 divisors (see below), whose sum is σ = 67197231072. Its totient is φ = 55935019600.

The previous prime is 61562991629. The next prime is 61562991691. The reversal of 61562991677 is 77619926516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61562991677 - 2⁶ = 61562991613 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 (61562997677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546274 + ... + 1585587.

It is an arithmetic number, because the mean of its divisors is an integer number (8399653884).

Almost surely, 2^61562991677 is an apocalyptic number.

It is an amenable number.

61562991677 is a deficient number, since it is larger than the sum of its proper divisors (5634239395).

61562991677 is a wasteful number, since it uses less digits than its factorization.

61562991677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133659.

The product of its digits is 8573040, while the sum is 59.

The spelling of 61562991677 in words is "sixty-one billion, five hundred sixty-two million, nine hundred ninety-one thousand, six hundred seventy-seven".