611621200651 has 2 divisors, whose sum is σ = 611621200652. Its totient is φ = 611621200650.

The previous prime is 611621200579. The next prime is 611621200669. The reversal of 611621200651 is 156002126116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611621200651 - 2¹³ = 611621192459 is a prime.

It is not a weakly prime, because it can be changed into another prime (611621203651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305810600325 + 305810600326.

It is an arithmetic number, because the mean of its divisors is an integer number (305810600326).

Almost surely, 2^611621200651 is an apocalyptic number.

611621200651 is a deficient number, since it is larger than the sum of its proper divisors (1).

611621200651 is an equidigital number, since it uses as much as digits as its factorization.

611621200651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 611621200651 its reverse (156002126116), we get a palindrome (767623326767).

The spelling of 611621200651 in words is "six hundred eleven billion, six hundred twenty-one million, two hundred thousand, six hundred fifty-one".