610621652421 has 48 divisors (see below), whose sum is σ = 995868432000. Its totient is φ = 357133902720.

The previous prime is 610621652419. The next prime is 610621652423. The reversal of 610621652421 is 124256126016.

610621652421 is a `hidden beast` number, since 6 + 1 + 0 + 621 + 6 + 5 + 2 + 4 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (610621652419) and next prime (610621652423).

It is not a de Polignac number, because 610621652421 - 2¹ = 610621652419 is a prime.

It is a super-2 number, since 2×610621652421² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610621652423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5801815 + ... + 5906123.

It is an arithmetic number, because the mean of its divisors is an integer number (20747259000).

Almost surely, 2^610621652421 is an apocalyptic number.

It is an amenable number.

610621652421 is a deficient number, since it is larger than the sum of its proper divisors (385246779579).

610621652421 is a wasteful number, since it uses less digits than its factorization.

610621652421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106394 (or 106391 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 610621652421 its reverse (124256126016), we get a palindrome (734877778437).

The spelling of 610621652421 in words is "six hundred ten billion, six hundred twenty-one million, six hundred fifty-two thousand, four hundred twenty-one".