61577087654 has 4 divisors (see below), whose sum is σ = 92365631484. Its totient is φ = 30788543826.

The previous prime is 61577087597. The next prime is 61577087657. The reversal of 61577087654 is 45678077516.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61577087654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61577087657) 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, 15394271912 + ... + 15394271915.

It is an arithmetic number, because the mean of its divisors is an integer number (23091407871).

Almost surely, 2^61577087654 is an apocalyptic number.

61577087654 is a deficient number, since it is larger than the sum of its proper divisors (30788543830).

61577087654 is a wasteful number, since it uses less digits than its factorization.

61577087654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30788543829.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 61577087654 in words is "sixty-one billion, five hundred seventy-seven million, eighty-seven thousand, six hundred fifty-four".