61150165501 has 4 divisors (see below), whose sum is σ = 61596517212. Its totient is φ = 60703813792.

The previous prime is 61150165451. The next prime is 61150165511. The reversal of 61150165501 is 10556105116.

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 53937740025 + 7212425476 = 232245^2 + 84926^2 .

It is a cyclic number.

It is not a de Polignac number, because 61150165501 - 2¹¹ = 61150163453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61150165511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223175650 + ... + 223175923.

It is an arithmetic number, because the mean of its divisors is an integer number (15399129303).

Almost surely, 2^61150165501 is an apocalyptic number.

It is an amenable number.

61150165501 is a deficient number, since it is larger than the sum of its proper divisors (446351711).

61150165501 is a wasteful number, since it uses less digits than its factorization.

61150165501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446351710.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 61150165501 in words is "sixty-one billion, one hundred fifty million, one hundred sixty-five thousand, five hundred one".