73256121854 has 4 divisors (see below), whose sum is σ = 109884182784. Its totient is φ = 36628060926.

The previous prime is 73256121853. The next prime is 73256121881. The reversal of 73256121854 is 45812165237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45812165237 = 21247 ⋅2156171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73256121853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18314030462 + ... + 18314030465.

It is an arithmetic number, because the mean of its divisors is an integer number (27471045696).

Almost surely, 2^73256121854 is an apocalyptic number.

73256121854 is a deficient number, since it is larger than the sum of its proper divisors (36628060930).

73256121854 is a wasteful number, since it uses less digits than its factorization.

73256121854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36628060929.

The product of its digits is 403200, while the sum is 44.

The spelling of 73256121854 in words is "seventy-three billion, two hundred fifty-six million, one hundred twenty-one thousand, eight hundred fifty-four".