78213463620425 has 12 divisors (see below), whose sum is σ = 110839651302336. Its totient is φ = 53632089339600.

The previous prime is 78213463620329. The next prime is 78213463620433. The reversal of 78213463620425 is 52402636431287.

It is a de Polignac number, because none of the positive numbers 2^k-78213463620425 is a prime.

It is a super-2 number, since 2×78213463620425² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223467038741 + ... + 223467039090.

It is an arithmetic number, because the mean of its divisors is an integer number (9236637608528).

Almost surely, 2^{78213463620425} is an apocalyptic number.

It is an amenable number.

78213463620425 is a deficient number, since it is larger than the sum of its proper divisors (32626187681911).

78213463620425 is a wasteful number, since it uses less digits than its factorization.

78213463620425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446934077848 (or 446934077843 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 53.

The spelling of 78213463620425 in words is "seventy-eight trillion, two hundred thirteen billion, four hundred sixty-three million, six hundred twenty thousand, four hundred twenty-five".