72454436387 has 2 divisors, whose sum is σ = 72454436388. Its totient is φ = 72454436386.

The previous prime is 72454436347. The next prime is 72454436393. The reversal of 72454436387 is 78363445427.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72454436387 - 2³⁰ = 71380694563 is a prime.

It is a super-2 number, since 2×72454436387² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72454436347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36227218193 + 36227218194.

It is an arithmetic number, because the mean of its divisors is an integer number (36227218194).

Almost surely, 2^72454436387 is an apocalyptic number.

72454436387 is a deficient number, since it is larger than the sum of its proper divisors (1).

72454436387 is an equidigital number, since it uses as much as digits as its factorization.

72454436387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13547520, while the sum is 53.

The spelling of 72454436387 in words is "seventy-two billion, four hundred fifty-four million, four hundred thirty-six thousand, three hundred eighty-seven".