54891520231640 has 64 divisors (see below), whose sum is σ = 123547339476000. Its totient is φ = 21949246126080.

The previous prime is 54891520231637. The next prime is 54891520231649. The reversal of 54891520231640 is 4613202519845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54891520231649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1826110931 + ... + 1826140989.

Almost surely, 2^{54891520231640} is an apocalyptic number.

It is an amenable number.

54891520231640 is an abundant number, since it is smaller than the sum of its proper divisors (68655819244360).

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

54891520231640 is a wasteful number, since it uses less digits than its factorization.

54891520231640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43860 (or 43856 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 54891520231640 in words is "fifty-four trillion, eight hundred ninety-one billion, five hundred twenty million, two hundred thirty-one thousand, six hundred forty".