621456116611155 has 64 divisors (see below), whose sum is σ = 1196522513832960. Its totient is φ = 269066228626944.

The previous prime is 621456116611151. The next prime is 621456116611331. The reversal of 621456116611155 is 551116611654126.

It is not a de Polignac number, because 621456116611155 - 2² = 621456116611151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621456116611098 and 621456116611107.

It is not an unprimeable number, because it can be changed into a prime (621456116611151) 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 63 ways as a sum of consecutive naturals, for example, 36691644 + ... + 50884073.

It is an arithmetic number, because the mean of its divisors is an integer number (18695664278640).

Almost surely, 2^{621456116611155} is an apocalyptic number.

621456116611155 is a deficient number, since it is larger than the sum of its proper divisors (575066397221805).

621456116611155 is a wasteful number, since it uses less digits than its factorization.

621456116611155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87579308.

The product of its digits is 1296000, while the sum is 51.

The spelling of 621456116611155 in words is "six hundred twenty-one trillion, four hundred fifty-six billion, one hundred sixteen million, six hundred eleven thousand, one hundred fifty-five".