1087261779072 has 128 divisors (see below), whose sum is σ = 3444121359360. Its totient is φ = 297139848192.

The previous prime is 1087261779031. The next prime is 1087261779089. The reversal of 1087261779072 is 2709771627801.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8731378 + ... + 8855025.

It is an arithmetic number, because the mean of its divisors is an integer number (26907198120).

Almost surely, 2^{1087261779072} is an apocalyptic number.

1087261779072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1087261779072 is an abundant number, since it is smaller than the sum of its proper divisors (2356859580288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1087261779072 is a wasteful number, since it uses less digits than its factorization.

1087261779072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17586450 (or 17586438 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 57.

The spelling of 1087261779072 in words is "one trillion, eighty-seven billion, two hundred sixty-one million, seven hundred seventy-nine thousand, seventy-two".