79641554 has 4 divisors (see below), whose sum is σ = 119462334. Its totient is φ = 39820776.

The previous prime is 79641553. The next prime is 79641589. The reversal of 79641554 is 45514697.

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

It can be written as a sum of positive squares in only one way, i.e., 77880625 + 1760929 = 8825^2 + 1327^2 .

It is not an unprimeable number, because it can be changed into a prime (79641553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19910387 + ... + 19910390.

Almost surely, 2^79641554 is an apocalyptic number.

79641554 is a deficient number, since it is larger than the sum of its proper divisors (39820780).

79641554 is a wasteful number, since it uses less digits than its factorization.

79641554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39820779.

The product of its digits is 151200, while the sum is 41.

The square root of 79641554 is about 8924.2116738679. The cubic root of 79641554 is about 430.2424340489.

The spelling of 79641554 in words is "seventy-nine million, six hundred forty-one thousand, five hundred fifty-four".