61000157165 has 4 divisors (see below), whose sum is σ = 73200188604. Its totient is φ = 48800125728.

The previous prime is 61000157131. The next prime is 61000157177. The reversal of 61000157165 is 56175100016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22012469956 + 38987687209 = 148366^2 + 197453^2 .

It is a cyclic number.

It is not a de Polignac number, because 61000157165 - 2¹⁴ = 61000140781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6100015712 + ... + 6100015721.

It is an arithmetic number, because the mean of its divisors is an integer number (18300047151).

Almost surely, 2^61000157165 is an apocalyptic number.

It is an amenable number.

61000157165 is a deficient number, since it is larger than the sum of its proper divisors (12200031439).

61000157165 is a wasteful number, since it uses less digits than its factorization.

61000157165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12200031438.

The product of its (nonzero) digits is 6300, while the sum is 32.

The spelling of 61000157165 in words is "sixty-one billion, one hundred fifty-seven thousand, one hundred sixty-five".