56478525642 has 128 divisors (see below), whose sum is σ = 156838809600. Its totient is φ = 14635857600.

The previous prime is 56478525583. The next prime is 56478525647. The reversal of 56478525642 is 24652587465.

56478525642 is a `hidden beast` number, since 5 + 6 + 4 + 78 + 5 + 2 + 564 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (56478525647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1809892 + ... + 1840832.

It is an arithmetic number, because the mean of its divisors is an integer number (1225303200).

Almost surely, 2^56478525642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56478525642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78419404800).

56478525642 is an abundant number, since it is smaller than the sum of its proper divisors (100360283958).

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

56478525642 is a wasteful number, since it uses less digits than its factorization.

56478525642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31409 (or 31403 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 54.

The spelling of 56478525642 in words is "fifty-six billion, four hundred seventy-eight million, five hundred twenty-five thousand, six hundred forty-two".