72435634507 has 2 divisors, whose sum is σ = 72435634508. Its totient is φ = 72435634506.

The previous prime is 72435634459. The next prime is 72435634541. The reversal of 72435634507 is 70543653427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72435634507 - 2¹⁵ = 72435601739 is a prime.

It is a super-2 number, since 2×72435634507² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72435634567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36217817253 + 36217817254.

It is an arithmetic number, because the mean of its divisors is an integer number (36217817254).

Almost surely, 2^72435634507 is an apocalyptic number.

72435634507 is a deficient number, since it is larger than the sum of its proper divisors (1).

72435634507 is an equidigital number, since it uses as much as digits as its factorization.

72435634507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 46.

The spelling of 72435634507 in words is "seventy-two billion, four hundred thirty-five million, six hundred thirty-four thousand, five hundred seven".