1651020620 has 48 divisors (see below), whose sum is σ = 3674432160. Its totient is φ = 620995584.

The previous prime is 1651020619. The next prime is 1651020629. The reversal of 1651020620 is 260201561.

It is not an unprimeable number, because it can be changed into a prime (1651020629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 702287 + ... + 704633.

It is an arithmetic number, because the mean of its divisors is an integer number (76550670).

Almost surely, 2^1651020620 is an apocalyptic number.

1651020620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651020620 is an abundant number, since it is smaller than the sum of its proper divisors (2023411540).

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

1651020620 is a wasteful number, since it uses less digits than its factorization.

1651020620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442 (or 4440 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1651020620 is about 40632.7530448036. The cubic root of 1651020620 is about 1181.9093430164.

The spelling of 1651020620 in words is "one billion, six hundred fifty-one million, twenty thousand, six hundred twenty".