61655010554 has 4 divisors (see below), whose sum is σ = 92482515834. Its totient is φ = 30827505276.

The previous prime is 61655010551. The next prime is 61655010581. The reversal of 61655010554 is 45501055616.

It is a happy number.

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., 59358013225 + 2296997329 = 243635^2 + 47927^2 .

It is not an unprimeable number, because it can be changed into a prime (61655010551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15413752637 + ... + 15413752640.

Almost surely, 2^61655010554 is an apocalyptic number.

61655010554 is a deficient number, since it is larger than the sum of its proper divisors (30827505280).

61655010554 is a wasteful number, since it uses less digits than its factorization.

61655010554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30827505279.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 61655010554 in words is "sixty-one billion, six hundred fifty-five million, ten thousand, five hundred fifty-four".