621758032130 has 32 divisors (see below), whose sum is σ = 1187471715840. Its totient is φ = 233584910080.

The previous prime is 621758032121. The next prime is 621758032139. The reversal of 621758032130 is 31230857126.

It is an interprime number because it is at equal distance from previous prime (621758032121) and next prime (621758032139).

It is a super-2 number, since 2×621758032130² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621758032139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3736316 + ... + 3899175.

It is an arithmetic number, because the mean of its divisors is an integer number (37108491120).

Almost surely, 2^621758032130 is an apocalyptic number.

621758032130 is a deficient number, since it is larger than the sum of its proper divisors (565713683710).

621758032130 is a wasteful number, since it uses less digits than its factorization.

621758032130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635994.

The product of its (nonzero) digits is 60480, while the sum is 38.

Adding to 621758032130 its reverse (31230857126), we get a palindrome (652988889256).

The spelling of 621758032130 in words is "six hundred twenty-one billion, seven hundred fifty-eight million, thirty-two thousand, one hundred thirty".