61676199551 has 4 divisors (see below), whose sum is σ = 61727899152. Its totient is φ = 61624499952.

The previous prime is 61676199547. The next prime is 61676199553. The reversal of 61676199551 is 15599167616.

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

It is a cyclic number.

It is not a de Polignac number, because 61676199551 - 2² = 61676199547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61676199553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25848011 + ... + 25850396.

It is an arithmetic number, because the mean of its divisors is an integer number (15431974788).

Almost surely, 2^61676199551 is an apocalyptic number.

61676199551 is a deficient number, since it is larger than the sum of its proper divisors (51699601).

61676199551 is a wasteful number, since it uses less digits than its factorization.

61676199551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51699600.

The product of its digits is 3061800, while the sum is 56.

The spelling of 61676199551 in words is "sixty-one billion, six hundred seventy-six million, one hundred ninety-nine thousand, five hundred fifty-one".