1651996836 has 48 divisors (see below), whose sum is σ = 4894807680. Its totient is φ = 471998880.

The previous prime is 1651996807. The next prime is 1651996847. The reversal of 1651996836 is 6386991561.

1651996836 is a `hidden beast` number, since 1 + 6 + 519 + 96 + 8 + 36 = 666.

It is a super-3 number, since 3×1651996836³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091835 + ... + 1093346.

It is an arithmetic number, because the mean of its divisors is an integer number (101975160).

Almost surely, 2^1651996836 is an apocalyptic number.

It is an amenable number.

1651996836 is an abundant number, since it is smaller than the sum of its proper divisors (3242810844).

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

1651996836 is a wasteful number, since it uses less digits than its factorization.

1651996836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185201 (or 2185193 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 1651996836 is about 40644.7639432191. The cubic root of 1651996836 is about 1182.1422436973.

It can be divided in two parts, 165 and 1996836, that added together give a triangular number (1997001 = T₁₉₉₈).

The spelling of 1651996836 in words is "one billion, six hundred fifty-one million, nine hundred ninety-six thousand, eight hundred thirty-six".