61554405074 has 4 divisors (see below), whose sum is σ = 92331607614. Its totient is φ = 30777202536.

The previous prime is 61554405047. The next prime is 61554405079. The reversal of 61554405074 is 47050445516.

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., 38826732025 + 22727673049 = 197045^2 + 150757^2 .

It is not an unprimeable number, because it can be changed into a prime (61554405079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15388601267 + ... + 15388601270.

Almost surely, 2^61554405074 is an apocalyptic number.

61554405074 is a deficient number, since it is larger than the sum of its proper divisors (30777202540).

61554405074 is a wasteful number, since it uses less digits than its factorization.

61554405074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30777202539.

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 61554405074 in words is "sixty-one billion, five hundred fifty-four million, four hundred five thousand, seventy-four".