551395247616 has 400 divisors, whose sum is σ = 1691925459840. Its totient is φ = 178676858880.

The previous prime is 551395247603. The next prime is 551395247621. The reversal of 551395247616 is 616742593155.

551395247616 is a `hidden beast` number, since 5 + 5 + 1 + 39 + 524 + 76 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 814468270 + ... + 814468946.

Almost surely, 2^551395247616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551395247616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845962729920).

551395247616 is an abundant number, since it is smaller than the sum of its proper divisors (1140530212224).

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

551395247616 is an equidigital number, since it uses as much as digits as its factorization.

551395247616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1202 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The spelling of 551395247616 in words is "five hundred fifty-one billion, three hundred ninety-five million, two hundred forty-seven thousand, six hundred sixteen".