61478655678252 has 144 divisors (see below), whose sum is σ = 167644215298560. Its totient is φ = 18933771233664.

The previous prime is 61478655678227. The next prime is 61478655678299. The reversal of 61478655678252 is 25287655687416.

61478655678252 is a `hidden beast` number, since 6 + 1 + 4 + 7 + 8 + 6 + 5 + 567 + 8 + 2 + 52 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17605533 + ... + 20806539.

Almost surely, 2^{61478655678252} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61478655678252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83822107649280).

61478655678252 is an abundant number, since it is smaller than the sum of its proper divisors (106165559620308).

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

61478655678252 is a wasteful number, since it uses less digits than its factorization.

61478655678252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201732 (or 3201727 counting only the distinct ones).

The product of its digits is 1354752000, while the sum is 72.

The spelling of 61478655678252 in words is "sixty-one trillion, four hundred seventy-eight billion, six hundred fifty-five million, six hundred seventy-eight thousand, two hundred fifty-two".