611602011601 has 4 divisors (see below), whose sum is σ = 698973727552. Its totient is φ = 524230295652.

The previous prime is 611602011593. The next prime is 611602011613. The reversal of 611602011601 is 106110206116.

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 not a de Polignac number, because 611602011601 - 2³ = 611602011593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611602011401) 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, 43685857965 + ... + 43685857978.

It is an arithmetic number, because the mean of its divisors is an integer number (174743431888).

Almost surely, 2^611602011601 is an apocalyptic number.

It is an amenable number.

611602011601 is a deficient number, since it is larger than the sum of its proper divisors (87371715951).

611602011601 is an equidigital number, since it uses as much as digits as its factorization.

611602011601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87371715950.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 611602011601 its reverse (106110206116), we get a palindrome (717712217717).

The spelling of 611602011601 in words is "six hundred eleven billion, six hundred two million, eleven thousand, six hundred one".