6121536401 has 2 divisors, whose sum is σ = 6121536402. Its totient is φ = 6121536400.

The previous prime is 6121536389. The next prime is 6121536419. The reversal of 6121536401 is 1046351216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5798974801 + 322561600 = 76151^2 + 17960^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121536401 - 2¹⁴ = 6121520017 is a prime.

It is not a weakly prime, because it can be changed into another prime (6121536461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060768200 + 3060768201.

It is an arithmetic number, because the mean of its divisors is an integer number (3060768201).

Almost surely, 2^6121536401 is an apocalyptic number.

It is an amenable number.

6121536401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121536401 is an equidigital number, since it uses as much as digits as its factorization.

6121536401 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 29.

The square root of 6121536401 is about 78240.2479610079. The cubic root of 6121536401 is about 1829.3079092317.

Adding to 6121536401 its reverse (1046351216), we get a palindrome (7167887617).

The spelling of 6121536401 in words is "six billion, one hundred twenty-one million, five hundred thirty-six thousand, four hundred one".