1072555867720 has 32 divisors (see below), whose sum is σ = 2414107022400. Its totient is φ = 428870112448.

The previous prime is 1072555867681. The next prime is 1072555867729. The reversal of 1072555867720 is 277685552701.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1072555867729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4643164 + ... + 4868683.

It is an arithmetic number, because the mean of its divisors is an integer number (75440844450).

Almost surely, 2^{1072555867720} is an apocalyptic number.

1072555867720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1072555867720 is an abundant number, since it is smaller than the sum of its proper divisors (1341551154680).

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

1072555867720 is a wasteful number, since it uses less digits than its factorization.

1072555867720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514677 (or 9514673 counting only the distinct ones).

The product of its (nonzero) digits is 8232000, while the sum is 55.

The spelling of 1072555867720 in words is "one trillion, seventy-two billion, five hundred fifty-five million, eight hundred sixty-seven thousand, seven hundred twenty".