2365138861551 has 64 divisors (see below), whose sum is σ = 3608605808640. Its totient is φ = 1530520531200.

The previous prime is 2365138861549. The next prime is 2365138861559. The reversal of 2365138861551 is 1551688315632.

2365138861551 is a `hidden beast` number, since 2 + 3 + 6 + 5 + 1 + 3 + 8 + 86 + 1 + 551 = 666.

It is not a de Polignac number, because 2365138861551 - 2¹ = 2365138861549 is a prime.

It is a super-2 number, since 2×2365138861551² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2365138861559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33209286 + ... + 33280428.

It is an arithmetic number, because the mean of its divisors is an integer number (56384465760).

Almost surely, 2^{2365138861551} is an apocalyptic number.

2365138861551 is a deficient number, since it is larger than the sum of its proper divisors (1243466947089).

2365138861551 is a wasteful number, since it uses less digits than its factorization.

2365138861551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71493 (or 71487 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 2365138861551 in words is "two trillion, three hundred sixty-five billion, one hundred thirty-eight million, eight hundred sixty-one thousand, five hundred fifty-one".