51001520454 has 64 divisors (see below), whose sum is σ = 115011809280. Its totient is φ = 16749573120.

The previous prime is 51001520411. The next prime is 51001520461. The reversal of 51001520454 is 45402510015.

It is a super-2 number, since 2×51001520454² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6985734 + ... + 6993030.

It is an arithmetic number, because the mean of its divisors is an integer number (1797059520).

Almost surely, 2^51001520454 is an apocalyptic number.

51001520454 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51001520454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57505904640).

51001520454 is an abundant number, since it is smaller than the sum of its proper divisors (64010288826).

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

51001520454 is a wasteful number, since it uses less digits than its factorization.

51001520454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9202 (or 9196 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 51001520454 in words is "fifty-one billion, one million, five hundred twenty thousand, four hundred fifty-four".