61698749148 has 36 divisors (see below), whose sum is σ = 155984050768. Its totient is φ = 20563174080.

The previous prime is 61698749143. The next prime is 61698749159. The reversal of 61698749148 is 84194789616.

61698749148 is a `hidden beast` number, since 6 + 1 + 69 + 87 + 491 + 4 + 8 = 666.

61698749148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61698749143) 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, 122640 + ... + 372072.

Almost surely, 2^61698749148 is an apocalyptic number.

It is an amenable number.

61698749148 is an abundant number, since it is smaller than the sum of its proper divisors (94285301620).

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

61698749148 is a wasteful number, since it uses less digits than its factorization.

61698749148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256314 (or 256309 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 61698749148 in words is "sixty-one billion, six hundred ninety-eight million, seven hundred forty-nine thousand, one hundred forty-eight".