1518969972 has 144 divisors (see below), whose sum is σ = 4099200000. Its totient is φ = 436295808.

The previous prime is 1518969971. The next prime is 1518969989. The reversal of 1518969972 is 2799698151.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

Its product of digits (2449440) is a multiple of the sum of its prime factors (630).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1518969971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3043779 + ... + 3044277.

Almost surely, 2^1518969972 is an apocalyptic number.

1518969972 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 1518969972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049600000).

1518969972 is an abundant number, since it is smaller than the sum of its proper divisors (2580230028).

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

1518969972 is a wasteful number, since it uses less digits than its factorization.

1518969972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 615 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 57.

The square root of 1518969972 is about 38973.9653101914. The cubic root of 1518969972 is about 1149.5196410943.

The spelling of 1518969972 in words is "one billion, five hundred eighteen million, nine hundred sixty-nine thousand, nine hundred seventy-two".