78242512252445 has 32 divisors (see below), whose sum is σ = 100319363136000. Its totient is φ = 58407763334976.

The previous prime is 78242512252409. The next prime is 78242512252517. The reversal of 78242512252445 is 54425221524287.

It is not a de Polignac number, because 78242512252445 - 2¹² = 78242512248349 is a prime.

It is a super-2 number, since 2×78242512252445² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54662582 + ... + 56075688.

It is an arithmetic number, because the mean of its divisors is an integer number (3134980098000).

Almost surely, 2^{78242512252445} is an apocalyptic number.

It is an amenable number.

78242512252445 is a deficient number, since it is larger than the sum of its proper divisors (22076850883555).

78242512252445 is a wasteful number, since it uses less digits than its factorization.

78242512252445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421897.

The product of its digits is 14336000, while the sum is 53.

The spelling of 78242512252445 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred twelve million, two hundred fifty-two thousand, four hundred forty-five".