64720126451 has 2 divisors, whose sum is σ = 64720126452. Its totient is φ = 64720126450.

The previous prime is 64720126409. The next prime is 64720126463. The reversal of 64720126451 is 15462102746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64720126451 - 2²² = 64715932147 is a prime.

It is not a weakly prime, because it can be changed into another prime (64720126951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32360063225 + 32360063226.

It is an arithmetic number, because the mean of its divisors is an integer number (32360063226).

Almost surely, 2^64720126451 is an apocalyptic number.

64720126451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64720126451 is an equidigital number, since it uses as much as digits as its factorization.

64720126451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 64720126451 in words is "sixty-four billion, seven hundred twenty million, one hundred twenty-six thousand, four hundred fifty-one".