61677320172726 has 8 divisors (see below), whose sum is σ = 123354640345464. Its totient is φ = 20559106724240.

The previous prime is 61677320172719. The next prime is 61677320172733. The reversal of 61677320172726 is 62727102377616.

It is an interprime number because it is at equal distance from previous prime (61677320172719) and next prime (61677320172733).

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

61677320172726 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5139776681055 + ... + 5139776681066.

It is an arithmetic number, because the mean of its divisors is an integer number (15419330043183).

Almost surely, 2^{61677320172726} is an apocalyptic number.

61677320172726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61677320172726 is a wasteful number, since it uses less digits than its factorization.

61677320172726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279553362126.

The product of its (nonzero) digits is 12446784, while the sum is 57.

The spelling of 61677320172726 in words is "sixty-one trillion, six hundred seventy-seven billion, three hundred twenty million, one hundred seventy-two thousand, seven hundred twenty-six".