1020056156520 has 64 divisors (see below), whose sum is σ = 3103269459840. Its totient is φ = 268183776000.

The previous prime is 1020056156519. The next prime is 1020056156521. The reversal of 1020056156520 is 256516500201.

It is an interprime number because it is at equal distance from previous prime (1020056156519) and next prime (1020056156521).

It is not an unprimeable number, because it can be changed into a prime (1020056156521) 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, 59853931 + ... + 59870970.

It is an arithmetic number, because the mean of its divisors is an integer number (48488585310).

Almost surely, 2^{1020056156520} is an apocalyptic number.

1020056156520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020056156520 is an abundant number, since it is smaller than the sum of its proper divisors (2083213303320).

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

1020056156520 is a wasteful number, since it uses less digits than its factorization.

1020056156520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119724986 (or 119724982 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 1020056156520 in words is "one trillion, twenty billion, fifty-six million, one hundred fifty-six thousand, five hundred twenty".