161615533007 has 2 divisors, whose sum is σ = 161615533008. Its totient is φ = 161615533006.

The previous prime is 161615532997. The next prime is 161615533019. The reversal of 161615533007 is 700335516161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161615533007 - 2³² = 157320565711 is a prime.

It is a super-2 number, since 2×161615533007² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161615533507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80807766503 + 80807766504.

It is an arithmetic number, because the mean of its divisors is an integer number (80807766504).

Almost surely, 2^161615533007 is an apocalyptic number.

161615533007 is a deficient number, since it is larger than the sum of its proper divisors (1).

161615533007 is an equidigital number, since it uses as much as digits as its factorization.

161615533007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 161615533007 in words is "one hundred sixty-one billion, six hundred fifteen million, five hundred thirty-three thousand, seven".