1079877987561 has 4 divisors (see below), whose sum is σ = 1439837316752. Its totient is φ = 719918658372.

The previous prime is 1079877987533. The next prime is 1079877987577. The reversal of 1079877987561 is 1657897789701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1079877987561 - 2⁶ = 1079877987497 is a prime.

It is a super-2 number, since 2×1079877987561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1079877987511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179979664591 + ... + 179979664596.

It is an arithmetic number, because the mean of its divisors is an integer number (359959329188).

Almost surely, 2^{1079877987561} is an apocalyptic number.

It is an amenable number.

1079877987561 is a deficient number, since it is larger than the sum of its proper divisors (359959329191).

1079877987561 is an equidigital number, since it uses as much as digits as its factorization.

1079877987561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359959329190.

The product of its (nonzero) digits is 373403520, while the sum is 75.

The spelling of 1079877987561 in words is "one trillion, seventy-nine billion, eight hundred seventy-seven million, nine hundred eighty-seven thousand, five hundred sixty-one".