1651512072 has 128 divisors (see below), whose sum is σ = 5068800000. Its totient is φ = 446983488.

The previous prime is 1651512067. The next prime is 1651512077. The reversal of 1651512072 is 2702151561.

It is an interprime number because it is at equal distance from previous prime (1651512067) and next prime (1651512077).

It is not an unprimeable number, because it can be changed into a prime (1651512077) 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, 151129 + ... + 161687.

It is an arithmetic number, because the mean of its divisors is an integer number (39600000).

Almost surely, 2^1651512072 is an apocalyptic number.

1651512072 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 1651512072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534400000).

1651512072 is an abundant number, since it is smaller than the sum of its proper divisors (3417287928).

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

1651512072 is a wasteful number, since it uses less digits than its factorization.

1651512072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608 (or 10590 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1651512072 is about 40638.8000807110. The cubic root of 1651512072 is about 1182.0266026233.

The spelling of 1651512072 in words is "one billion, six hundred fifty-one million, five hundred twelve thousand, seventy-two".