61725570551 has 8 divisors (see below), whose sum is σ = 62175212400. Its totient is φ = 61277488128.

The previous prime is 61725570509. The next prime is 61725570701. The reversal of 61725570551 is 15507552716.

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 61725570551 - 2¹⁰ = 61725569527 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 (61725570251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310346 + ... + 468791.

It is an arithmetic number, because the mean of its divisors is an integer number (7771901550).

Almost surely, 2^61725570551 is an apocalyptic number.

61725570551 is a deficient number, since it is larger than the sum of its proper divisors (449641849).

61725570551 is a wasteful number, since it uses less digits than its factorization.

61725570551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779713.

The product of its (nonzero) digits is 367500, while the sum is 44.

The spelling of 61725570551 in words is "sixty-one billion, seven hundred twenty-five million, five hundred seventy thousand, five hundred fifty-one".