1231840979358 has 16 divisors (see below), whose sum is σ = 2687653046016. Its totient is φ = 373285145240.

The previous prime is 1231840979357. The next prime is 1231840979359. The reversal of 1231840979358 is 8539790481321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231840979357) and next prime (1231840979359).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231840979351) 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, 9332128566 + ... + 9332128697.

It is an arithmetic number, because the mean of its divisors is an integer number (167978315376).

Almost surely, 2^{1231840979358} is an apocalyptic number.

1231840979358 is an abundant number, since it is smaller than the sum of its proper divisors (1455812066658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231840979358 is a wasteful number, since it uses less digits than its factorization.

1231840979358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18664257279.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 1231840979358 in words is "one trillion, two hundred thirty-one billion, eight hundred forty million, nine hundred seventy-nine thousand, three hundred fifty-eight".