1078577890157 has 4 divisors (see below), whose sum is σ = 1078580209980. Its totient is φ = 1078575570336.

The previous prime is 1078577890129. The next prime is 1078577890219. The reversal of 1078577890157 is 7510987758701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 751005959236 + 327571930921 = 866606^2 + 572339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078577890157 - 2¹⁴ = 1078577873773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1078577890093 and 1078577890102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078577880157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194858 + ... + 1481595.

It is an arithmetic number, because the mean of its divisors is an integer number (269645052495).

Almost surely, 2^{1078577890157} is an apocalyptic number.

It is an amenable number.

1078577890157 is a deficient number, since it is larger than the sum of its proper divisors (2319823).

1078577890157 is an equidigital number, since it uses as much as digits as its factorization.

1078577890157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319822.

The product of its (nonzero) digits is 34574400, while the sum is 65.

The spelling of 1078577890157 in words is "one trillion, seventy-eight billion, five hundred seventy-seven million, eight hundred ninety thousand, one hundred fifty-seven".