78148202701647 has 32 divisors (see below), whose sum is σ = 117925712278528. Its totient is φ = 45703266408576.

The previous prime is 78148202701619. The next prime is 78148202701651. The reversal of 78148202701647 is 74610720284187.

It is not a de Polignac number, because 78148202701647 - 2¹⁴ = 78148202685263 is a prime.

It is a super-2 number, since 2×78148202701647² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78148202701607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629667703 + ... + 629791800.

It is an arithmetic number, because the mean of its divisors is an integer number (3685178508704).

Almost surely, 2^{78148202701647} is an apocalyptic number.

78148202701647 is a deficient number, since it is larger than the sum of its proper divisors (39777509576881).

78148202701647 is a wasteful number, since it uses less digits than its factorization.

78148202701647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259459599.

The product of its (nonzero) digits is 8429568, while the sum is 57.

The spelling of 78148202701647 in words is "seventy-eight trillion, one hundred forty-eight billion, two hundred two million, seven hundred one thousand, six hundred forty-seven".