61425067569 has 4 divisors (see below), whose sum is σ = 81900090096. Its totient is φ = 40950045044.

The previous prime is 61425067547. The next prime is 61425067601. The reversal of 61425067569 is 96576052416.

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 a cyclic number.

It is not a de Polignac number, because 61425067569 - 2⁹ = 61425067057 is a prime.

It is a super-2 number, since 2×61425067569² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61425067169) 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, 10237511259 + ... + 10237511264.

It is an arithmetic number, because the mean of its divisors is an integer number (20475022524).

Almost surely, 2^61425067569 is an apocalyptic number.

It is an amenable number.

61425067569 is a deficient number, since it is larger than the sum of its proper divisors (20475022527).

61425067569 is a wasteful number, since it uses less digits than its factorization.

61425067569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20475022526.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 61425067569 in words is "sixty-one billion, four hundred twenty-five million, sixty-seven thousand, five hundred sixty-nine".