61551565654 has 4 divisors (see below), whose sum is σ = 92327348484. Its totient is φ = 30775782826.

The previous prime is 61551565651. The next prime is 61551565657. The reversal of 61551565654 is 45656515516.

61551565654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (61551565651) and next prime (61551565657).

It is a junction number, because it is equal to n+sod(n) for n = 61551565598 and 61551565607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551565651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15387891412 + ... + 15387891415.

It is an arithmetic number, because the mean of its divisors is an integer number (23081837121).

Almost surely, 2^61551565654 is an apocalyptic number.

61551565654 is a deficient number, since it is larger than the sum of its proper divisors (30775782830).

61551565654 is a wasteful number, since it uses less digits than its factorization.

61551565654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30775782829.

The product of its digits is 2700000, while the sum is 49.

The spelling of 61551565654 in words is "sixty-one billion, five hundred fifty-one million, five hundred sixty-five thousand, six hundred fifty-four".