623646151551 has 16 divisors (see below), whose sum is σ = 924082856800. Its totient is φ = 415690916544.

The previous prime is 623646151549. The next prime is 623646151553. The reversal of 623646151551 is 155151646326.

623646151551 is a `hidden beast` number, since 6 + 2 + 3 + 6 + 46 + 1 + 51 + 551 = 666.

623646151551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (623646151549) and next prime (623646151553).

It is not a de Polignac number, because 623646151551 - 2¹ = 623646151549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623646151497 and 623646151506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623646151553) 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, 1876456 + ... + 2183661.

It is an arithmetic number, because the mean of its divisors is an integer number (57755178550).

Almost surely, 2^623646151551 is an apocalyptic number.

623646151551 is a deficient number, since it is larger than the sum of its proper divisors (300436705249).

623646151551 is a wasteful number, since it uses less digits than its factorization.

623646151551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065815 (or 4065809 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

Adding to 623646151551 its reverse (155151646326), we get a palindrome (778797797877).

The spelling of 623646151551 in words is "six hundred twenty-three billion, six hundred forty-six million, one hundred fifty-one thousand, five hundred fifty-one".