9781400057 has 24 divisors (see below), whose sum is σ = 11596536000. Its totient is φ = 8195378400.

The previous prime is 9781400039. The next prime is 9781400077. The reversal of 9781400057 is 7500041879.

9781400057 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9781400057 - 2¹⁸ = 9781137913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9781399987 and 9781400023.

It is not an unprimeable number, because it can be changed into a prime (9781400077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1082444 + ... + 1091442.

It is an arithmetic number, because the mean of its divisors is an integer number (483189000).

Almost surely, 2^9781400057 is an apocalyptic number.

It is an amenable number.

9781400057 is a deficient number, since it is larger than the sum of its proper divisors (1815135943).

9781400057 is a wasteful number, since it uses less digits than its factorization.

9781400057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9725 (or 9714 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 9781400057 is about 98900.9608497309. The cubic root of 9781400057 is about 2138.6202461452.

The spelling of 9781400057 in words is "nine billion, seven hundred eighty-one million, four hundred thousand, fifty-seven".