1378858426864 has 20 divisors (see below), whose sum is σ = 2677023921904. Its totient is φ = 688013543808.

The previous prime is 1378858426861. The next prime is 1378858426943. The reversal of 1378858426864 is 4686248588731.

It is a super-2 number, since 2×1378858426864² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378858426793 and 1378858426802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378858426861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88471317 + ... + 88486900.

Almost surely, 2^{1378858426864} is an apocalyptic number.

It is an amenable number.

1378858426864 is a deficient number, since it is larger than the sum of its proper divisors (1298165495040).

1378858426864 is a wasteful number, since it uses less digits than its factorization.

1378858426864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176958712 (or 176958706 counting only the distinct ones).

The product of its digits is 495452160, while the sum is 70.

The spelling of 1378858426864 in words is "one trillion, three hundred seventy-eight billion, eight hundred fifty-eight million, four hundred twenty-six thousand, eight hundred sixty-four".