620400506650 has 24 divisors (see below), whose sum is σ = 1221824058300. Its totient is φ = 233562543360.

The previous prime is 620400506647. The next prime is 620400506653. The reversal of 620400506650 is 56605004026.

It is an interprime number because it is at equal distance from previous prime (620400506647) and next prime (620400506653).

It can be written as a sum of positive squares in 6 ways, for example, as 347261525521 + 273138981129 = 589289^2 + 522627^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (620400506653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364940625 + ... + 364942324.

Almost surely, 2^620400506650 is an apocalyptic number.

620400506650 is a deficient number, since it is larger than the sum of its proper divisors (601423551650).

620400506650 is a wasteful number, since it uses less digits than its factorization.

620400506650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729882978 (or 729882973 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 620400506650 in words is "six hundred twenty billion, four hundred million, five hundred six thousand, six hundred fifty".