61633157 has 4 divisors (see below), whose sum is σ = 63298956. Its totient is φ = 59967360.

The previous prime is 61633139. The next prime is 61633163. The reversal of 61633157 is 75133616.

61633157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53787556 + 7845601 = 7334^2 + 2801^2 .

It is a cyclic number.

It is not a de Polignac number, because 61633157 - 2¹⁰ = 61632133 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 (61633357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832844 + ... + 832917.

It is an arithmetic number, because the mean of its divisors is an integer number (15824739).

Almost surely, 2^61633157 is an apocalyptic number.

It is an amenable number.

61633157 is a deficient number, since it is larger than the sum of its proper divisors (1665799).

61633157 is a wasteful number, since it uses less digits than its factorization.

61633157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665798.

The product of its digits is 11340, while the sum is 32.

The square root of 61633157 is about 7850.6787604640. The cubic root of 61633157 is about 395.0070115724.

The spelling of 61633157 in words is "sixty-one million, six hundred thirty-three thousand, one hundred fifty-seven".