1520845854 has 64 divisors (see below), whose sum is σ = 3436722432. Its totient is φ = 448319520.

The previous prime is 1520845853. The next prime is 1520845871. The reversal of 1520845854 is 4585480251.

It is a super-2 number, since 2×1520845854² = 4625944223257978632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520845853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292909 + ... + 298055.

It is an arithmetic number, because the mean of its divisors is an integer number (53698788).

Almost surely, 2^1520845854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520845854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718361216).

1520845854 is an abundant number, since it is smaller than the sum of its proper divisors (1915876578).

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

1520845854 is a wasteful number, since it uses less digits than its factorization.

1520845854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222 (or 5200 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 42.

The square root of 1520845854 is about 38998.0237191579. The cubic root of 1520845854 is about 1149.9926537653.

The spelling of 1520845854 in words is "one billion, five hundred twenty million, eight hundred forty-five thousand, eight hundred fifty-four".