42780617730 has 48 divisors (see below), whose sum is σ = 111325518720. Its totient is φ = 11398327584.

The previous prime is 42780617729. The next prime is 42780617749. The reversal of 42780617730 is 3771608724.

42780617730 is a `hidden beast` number, since 4 + 27 + 8 + 0 + 617 + 7 + 3 + 0 = 666.

42780617730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99690 + ... + 309029.

It is an arithmetic number, because the mean of its divisors is an integer number (2319281640).

Almost surely, 2^42780617730 is an apocalyptic number.

42780617730 is an abundant number, since it is smaller than the sum of its proper divisors (68544900990).

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

42780617730 is a wasteful number, since it uses less digits than its factorization.

42780617730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409895 (or 409892 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 42780617730 in words is "forty-two billion, seven hundred eighty million, six hundred seventeen thousand, seven hundred thirty".