78408001347553 has 2 divisors, whose sum is σ = 78408001347554. Its totient is φ = 78408001347552.

The previous prime is 78408001347521. The next prime is 78408001347623. The reversal of 78408001347553 is 35574310080487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77095915863184 + 1312085484369 = 8780428^2 + 1145463^2 .

It is a cyclic number.

It is not a de Polignac number, because 78408001347553 - 2⁵ = 78408001347521 is a prime.

It is a super-2 number, since 2×78408001347553² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78408001347494 and 78408001347503.

It is not a weakly prime, because it can be changed into another prime (78408001347353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39204000673776 + 39204000673777.

It is an arithmetic number, because the mean of its divisors is an integer number (39204000673777).

Almost surely, 2^{78408001347553} is an apocalyptic number.

It is an amenable number.

78408001347553 is a deficient number, since it is larger than the sum of its proper divisors (1).

78408001347553 is an equidigital number, since it uses as much as digits as its factorization.

78408001347553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 78408001347553 in words is "seventy-eight trillion, four hundred eight billion, one million, three hundred forty-seven thousand, five hundred fifty-three".