70161550 has 48 divisors (see below), whose sum is σ = 139209840. Its totient is φ = 26216960.

The previous prime is 70161517. The next prime is 70161563. The reversal of 70161550 is 5516107.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167241 + ... + 167659.

It is an arithmetic number, because the mean of its divisors is an integer number (2900205).

Almost surely, 2^70161550 is an apocalyptic number.

70161550 is a deficient number, since it is larger than the sum of its proper divisors (69048290).

70161550 is a wasteful number, since it uses less digits than its factorization.

70161550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 70161550 is about 8376.2491605730. The cubic root of 70161550 is about 412.4453309858.

Adding to 70161550 its reverse (5516107), we get a palindrome (75677657).

The spelling of 70161550 in words is "seventy million, one hundred sixty-one thousand, five hundred fifty".