1378813531942 has 16 divisors (see below), whose sum is σ = 2578560371712. Its totient is φ = 537200077320.

The previous prime is 1378813531897. The next prime is 1378813531943. The reversal of 1378813531942 is 2491353188731.

It is a super-2 number, since 2×1378813531942² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378813531943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4476667158 + ... + 4476667465.

It is an arithmetic number, because the mean of its divisors is an integer number (161160023232).

Almost surely, 2^{1378813531942} is an apocalyptic number.

1378813531942 is a deficient number, since it is larger than the sum of its proper divisors (1199746839770).

1378813531942 is a wasteful number, since it uses less digits than its factorization.

1378813531942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953334643.

The product of its digits is 4354560, while the sum is 55.

The spelling of 1378813531942 in words is "one trillion, three hundred seventy-eight billion, eight hundred thirteen million, five hundred thirty-one thousand, nine hundred forty-two".