1954515557142 has 96 divisors (see below), whose sum is σ = 4347458519040. Its totient is φ = 634319605440.

The previous prime is 1954515557117. The next prime is 1954515557149. The reversal of 1954515557142 is 2417555154591.

1954515557142 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 515 + 55 + 71 + 4 + 2 = 666.

It is a super-2 number, since 2×1954515557142² (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 (1954515557149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337506267 + ... + 337512057.

It is an arithmetic number, because the mean of its divisors is an integer number (45286026240).

Almost surely, 2^{1954515557142} is an apocalyptic number.

1954515557142 is an abundant number, since it is smaller than the sum of its proper divisors (2392942961898).

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

1954515557142 is a wasteful number, since it uses less digits than its factorization.

1954515557142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858 (or 7855 counting only the distinct ones).

The product of its digits is 6300000, while the sum is 54.

The spelling of 1954515557142 in words is "one trillion, nine hundred fifty-four billion, five hundred fifteen million, five hundred fifty-seven thousand, one hundred forty-two".