61697430252 has 36 divisors (see below), whose sum is σ = 159761235816. Its totient is φ = 20064204480.

The previous prime is 61697430247. The next prime is 61697430271. The reversal of 61697430252 is 25203479616.

61697430252 is a `hidden beast` number, since 6 + 169 + 7 + 430 + 2 + 52 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 61697430198 and 61697430207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20898738 + ... + 20901689.

It is an arithmetic number, because the mean of its divisors is an integer number (4437812106).

Almost surely, 2^61697430252 is an apocalyptic number.

It is an amenable number.

61697430252 is an abundant number, since it is smaller than the sum of its proper divisors (98063805564).

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

61697430252 is a wasteful number, since it uses less digits than its factorization.

61697430252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41800478 (or 41800473 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 61697430252 in words is "sixty-one billion, six hundred ninety-seven million, four hundred thirty thousand, two hundred fifty-two".