610421909801 has 4 divisors (see below), whose sum is σ = 665914810704. Its totient is φ = 554929008900.

The previous prime is 610421909767. The next prime is 610421909807. The reversal of 610421909801 is 108909124016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-610421909801 is a prime.

It is a super-2 number, since 2×610421909801² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (610421909807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27746450435 + ... + 27746450456.

It is an arithmetic number, because the mean of its divisors is an integer number (166478702676).

Almost surely, 2^610421909801 is an apocalyptic number.

It is an amenable number.

610421909801 is a deficient number, since it is larger than the sum of its proper divisors (55492900903).

610421909801 is a wasteful number, since it uses less digits than its factorization.

610421909801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55492900902.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 610421909801 in words is "six hundred ten billion, four hundred twenty-one million, nine hundred nine thousand, eight hundred one".