1020615721152 has 112 divisors (see below), whose sum is σ = 2741369444352. Its totient is φ = 335051458560.

The previous prime is 1020615721141. The next prime is 1020615721159. The reversal of 1020615721152 is 2511275160201.

It is not an unprimeable number, because it can be changed into a prime (1020615721159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12733233 + ... + 12813135.

It is an arithmetic number, because the mean of its divisors is an integer number (24476512896).

Almost surely, 2^{1020615721152} is an apocalyptic number.

1020615721152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020615721152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370684722176).

1020615721152 is an abundant number, since it is smaller than the sum of its proper divisors (1720753723200).

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

1020615721152 is an equidigital number, since it uses as much as digits as its factorization.

1020615721152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80926 (or 80916 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 1020615721152 in words is "one trillion, twenty billion, six hundred fifteen million, seven hundred twenty-one thousand, one hundred fifty-two".