57684784978 has 8 divisors (see below), whose sum is σ = 86529847680. Its totient is φ = 28841502420.

The previous prime is 57684784973. The next prime is 57684784979. The reversal of 57684784978 is 87948748675.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 57684784978.

It is not an unprimeable number, because it can be changed into a prime (57684784973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360838 + ... + 495553.

It is an arithmetic number, because the mean of its divisors is an integer number (10816230960).

Almost surely, 2^57684784978 is an apocalyptic number.

57684784978 is a deficient number, since it is larger than the sum of its proper divisors (28845062702).

57684784978 is a wasteful number, since it uses less digits than its factorization.

57684784978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890072.

The product of its digits is 758661120, while the sum is 73.

It can be divided in two parts, 576847 and 84978, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 57684784978 in words is "fifty-seven billion, six hundred eighty-four million, seven hundred eighty-four thousand, nine hundred seventy-eight".