61560577471 has 4 divisors (see below), whose sum is σ = 61824786192. Its totient is φ = 61296368752.

The previous prime is 61560577451. The next prime is 61560577483. The reversal of 61560577471 is 17477506516.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61560577471 - 2⁵ = 61560577439 is a prime.

It is a super-3 number, since 3×61560577471³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61560577451) 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, 132104011 + ... + 132104476.

It is an arithmetic number, because the mean of its divisors is an integer number (15456196548).

Almost surely, 2^61560577471 is an apocalyptic number.

61560577471 is a deficient number, since it is larger than the sum of its proper divisors (264208721).

61560577471 is a wasteful number, since it uses less digits than its factorization.

61560577471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264208720.

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 61560577471 in words is "sixty-one billion, five hundred sixty million, five hundred seventy-seven thousand, four hundred seventy-one".