2157528867758 has 64 divisors (see below), whose sum is σ = 3755257459200. Its totient is φ = 920085936000.

The previous prime is 2157528867757. The next prime is 2157528867817. The reversal of 2157528867758 is 8577688257512.

It is a junction number, because it is equal to n+sod(n) for n = 2157528867691 and 2157528867700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157528867757) 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, 5271068 + ... + 5665616.

It is an arithmetic number, because the mean of its divisors is an integer number (58675897800).

Almost surely, 2^{2157528867758} is an apocalyptic number.

2157528867758 is a deficient number, since it is larger than the sum of its proper divisors (1597728591442).

2157528867758 is a wasteful number, since it uses less digits than its factorization.

2157528867758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394793.

The product of its digits is 526848000, while the sum is 71.

The spelling of 2157528867758 in words is "two trillion, one hundred fifty-seven billion, five hundred twenty-eight million, eight hundred sixty-seven thousand, seven hundred fifty-eight".