57780557580 has 96 divisors (see below), whose sum is σ = 167764040640. Its totient is φ = 14841308160.

The previous prime is 57780557579. The next prime is 57780557581. The reversal of 57780557580 is 8575508775.

It is an interprime number because it is at equal distance from previous prime (57780557579) and next prime (57780557581).

It is a self number, because there is not a number n which added to its sum of digits gives 57780557580.

It is not an unprimeable number, because it can be changed into a prime (57780557581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693102 + ... + 771978.

It is an arithmetic number, because the mean of its divisors is an integer number (1747542090).

Almost surely, 2^57780557580 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 57780557580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83882020320).

57780557580 is an abundant number, since it is smaller than the sum of its proper divisors (109983483060).

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

57780557580 is a wasteful number, since it uses less digits than its factorization.

57780557580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79339 (or 79337 counting only the distinct ones).

The product of its (nonzero) digits is 13720000, while the sum is 57.

The spelling of 57780557580 in words is "fifty-seven billion, seven hundred eighty million, five hundred fifty-seven thousand, five hundred eighty".