61049969478 has 24 divisors (see below), whose sum is σ = 133013907000. Its totient is φ = 20236301664.

The previous prime is 61049969473. The next prime is 61049969489. The reversal of 61049969478 is 87496994016.

61049969478 is a `hidden beast` number, since 6 + 10 + 4 + 99 + 69 + 478 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61049969471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9470703 + ... + 9477146.

It is an arithmetic number, because the mean of its divisors is an integer number (5542246125).

Almost surely, 2^61049969478 is an apocalyptic number.

61049969478 is an abundant number, since it is smaller than the sum of its proper divisors (71963937522).

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

61049969478 is a wasteful number, since it uses less digits than its factorization.

61049969478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18948036 (or 18948033 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 61049969478 in words is "sixty-one billion, forty-nine million, nine hundred sixty-nine thousand, four hundred seventy-eight".