1651515156 has 60 divisors (see below), whose sum is σ = 4348565760. Its totient is φ = 546529680.

The previous prime is 1651515149. The next prime is 1651515163. The reversal of 1651515156 is 6515151561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1651515149) and next prime (1651515163).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1651515156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26701 + ... + 63371.

It is an arithmetic number, because the mean of its divisors is an integer number (72476096).

Almost surely, 2^1651515156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651515156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2174282880).

1651515156 is an abundant number, since it is smaller than the sum of its proper divisors (2697050604).

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

1651515156 is a wasteful number, since it uses less digits than its factorization.

1651515156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36826 (or 36815 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 1651515156 is about 40638.8380247270. The cubic root of 1651515156 is about 1182.0273383870.

The spelling of 1651515156 in words is "one billion, six hundred fifty-one million, five hundred fifteen thousand, one hundred fifty-six".