4861629978 has 32 divisors (see below), whose sum is σ = 10837074240. Its totient is φ = 1444942080.

The previous prime is 4861629943. The next prime is 4861629979. The reversal of 4861629978 is 8799261684.

It is not an unprimeable number, because it can be changed into a prime (4861629979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1252353 + ... + 1256228.

It is an arithmetic number, because the mean of its divisors is an integer number (338658570).

Almost surely, 2^4861629978 is an apocalyptic number.

4861629978 is an abundant number, since it is smaller than the sum of its proper divisors (5975444262).

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

4861629978 is a wasteful number, since it uses less digits than its factorization.

4861629978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508622.

The product of its digits is 10450944, while the sum is 60.

The square root of 4861629978 is about 69725.3897658522. The cubic root of 4861629978 is about 1694.0541972422.

The spelling of 4861629978 in words is "four billion, eight hundred sixty-one million, six hundred twenty-nine thousand, nine hundred seventy-eight".