521025550410454 has 4 divisors (see below), whose sum is σ = 781538325615684. Its totient is φ = 260512775205226.

The previous prime is 521025550410439. The next prime is 521025550410499. The reversal of 521025550410454 is 454014055520125.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×521025550410454² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521025550410454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130256387602612 + ... + 130256387602615.

It is an arithmetic number, because the mean of its divisors is an integer number (195384581403921).

Almost surely, 2^{521025550410454} is an apocalyptic number.

521025550410454 is a deficient number, since it is larger than the sum of its proper divisors (260512775205230).

521025550410454 is a wasteful number, since it uses less digits than its factorization.

521025550410454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260512775205229.

The product of its (nonzero) digits is 800000, while the sum is 43.

The spelling of 521025550410454 in words is "five hundred twenty-one trillion, twenty-five billion, five hundred fifty million, four hundred ten thousand, four hundred fifty-four".