1018158459972 has 96 divisors (see below), whose sum is σ = 2550525449472. Its totient is φ = 314970402816.

The previous prime is 1018158459971. The next prime is 1018158459991. The reversal of 1018158459972 is 2799548518101.

1018158459972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1018158459972² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1018158459971) 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, 120874153 + ... + 120882575.

It is an arithmetic number, because the mean of its divisors is an integer number (26567973432).

Almost surely, 2^{1018158459972} is an apocalyptic number.

1018158459972 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 1018158459972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275262724736).

1018158459972 is an abundant number, since it is smaller than the sum of its proper divisors (1532366989500).

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

1018158459972 is a wasteful number, since it uses less digits than its factorization.

1018158459972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16637 (or 16635 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 60.

The spelling of 1018158459972 in words is "one trillion, eighteen billion, one hundred fifty-eight million, four hundred fifty-nine thousand, nine hundred seventy-two".