61547680969 has 16 divisors (see below), whose sum is σ = 64648396800. Its totient is φ = 58526259264.

The previous prime is 61547680939. The next prime is 61547680973. The reversal of 61547680969 is 96908674516.

It is a cyclic number.

It is not a de Polignac number, because 61547680969 - 2¹⁷ = 61547549897 is a prime.

It is a super-2 number, since 2×61547680969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61547680939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207992 + ... + 1257910.

It is an arithmetic number, because the mean of its divisors is an integer number (4040524800).

Almost surely, 2^61547680969 is an apocalyptic number.

It is an amenable number.

61547680969 is a deficient number, since it is larger than the sum of its proper divisors (3100715831).

61547680969 is a wasteful number, since it uses less digits than its factorization.

61547680969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50712.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 61547680969 in words is "sixty-one billion, five hundred forty-seven million, six hundred eighty thousand, nine hundred sixty-nine".