73685587249 has 2 divisors, whose sum is σ = 73685587250. Its totient is φ = 73685587248.

The previous prime is 73685587211. The next prime is 73685587277. The reversal of 73685587249 is 94278558637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46940255649 + 26745331600 = 216657^2 + 163540^2 .

It is a cyclic number.

It is not a de Polignac number, because 73685587249 - 2⁷ = 73685587121 is a prime.

It is not a weakly prime, because it can be changed into another prime (73685582249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36842793624 + 36842793625.

It is an arithmetic number, because the mean of its divisors is an integer number (36842793625).

Almost surely, 2^73685587249 is an apocalyptic number.

It is an amenable number.

73685587249 is a deficient number, since it is larger than the sum of its proper divisors (1).

73685587249 is an equidigital number, since it uses as much as digits as its factorization.

73685587249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101606400, while the sum is 64.

The spelling of 73685587249 in words is "seventy-three billion, six hundred eighty-five million, five hundred eighty-seven thousand, two hundred forty-nine".