57787878775 has 72 divisors (see below), whose sum is σ = 82822824000. Its totient is φ = 39909408000.

The previous prime is 57787878761. The next prime is 57787878793.

It is a happy number.

57787878775 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 57787878775 - 2¹⁵ = 57787846007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5345826 + ... + 5356624.

It is an arithmetic number, because the mean of its divisors is an integer number (1150317000).

Almost surely, 2^57787878775 is an apocalyptic number.

57787878775 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

57787878775 is a deficient number, since it is larger than the sum of its proper divisors (25034945225).

57787878775 is a wasteful number, since it uses less digits than its factorization.

57787878775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10921 (or 10905 counting only the distinct ones).

The product of its digits is 1505907200, while the sum is 76.

The spelling of 57787878775 in words is "fifty-seven billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred seventy-five".