2238078357657 has 24 divisors (see below), whose sum is σ = 3397365143744. Its totient is φ = 1417965411744.

The previous prime is 2238078357631. The next prime is 2238078357659. The reversal of 2238078357657 is 7567538708322.

2238078357657 is a `hidden beast` number, since 2 + 2 + 3 + 8 + 0 + 7 + 8 + 3 + 576 + 57 = 666.

It is not a de Polignac number, because 2238078357657 - 2²⁶ = 2238011248793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2238078357594 and 2238078357603.

It is not an unprimeable number, because it can be changed into a prime (2238078357659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78136333 + ... + 78164970.

Almost surely, 2^{2238078357657} is an apocalyptic number.

It is an amenable number.

2238078357657 is a deficient number, since it is larger than the sum of its proper divisors (1159286786087).

2238078357657 is a wasteful number, since it uses less digits than its factorization.

2238078357657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156301389 (or 156301386 counting only the distinct ones).

The product of its (nonzero) digits is 118540800, while the sum is 63.

The spelling of 2238078357657 in words is "two trillion, two hundred thirty-eight billion, seventy-eight million, three hundred fifty-seven thousand, six hundred fifty-seven".