61522685654 has 4 divisors (see below), whose sum is σ = 92284028484. Its totient is φ = 30761342826.

The previous prime is 61522685641. The next prime is 61522685657. The reversal of 61522685654 is 45658622516.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61522685657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15380671412 + ... + 15380671415.

It is an arithmetic number, because the mean of its divisors is an integer number (23071007121).

Almost surely, 2^61522685654 is an apocalyptic number.

61522685654 is a deficient number, since it is larger than the sum of its proper divisors (30761342830).

61522685654 is a wasteful number, since it uses less digits than its factorization.

61522685654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30761342829.

The product of its digits is 3456000, while the sum is 50.

The spelling of 61522685654 in words is "sixty-one billion, five hundred twenty-two million, six hundred eighty-five thousand, six hundred fifty-four".