1651000040 has 16 divisors (see below), whose sum is σ = 3714750180. Its totient is φ = 660400000.

The previous prime is 1651000037. The next prime is 1651000103. The reversal of 1651000040 is 400001561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1498773796 + 152226244 = 38714^2 + 12338^2 .

It is a super-3 number, since 3×1651000040³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1650999982 and 1651000018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20637461 + ... + 20637540.

Almost surely, 2^1651000040 is an apocalyptic number.

1651000040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651000040 is an abundant number, since it is smaller than the sum of its proper divisors (2063750140).

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

1651000040 is a wasteful number, since it uses less digits than its factorization.

1651000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41275012 (or 41275008 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1651000040 is about 40632.4998000369. The cubic root of 1651000040 is about 1181.9044321560.

The spelling of 1651000040 in words is "one billion, six hundred fifty-one million, forty", and thus it is an aban number.