61949359887 has 8 divisors (see below), whose sum is σ = 83229674880. Its totient is φ = 40984309080.

The previous prime is 61949359883. The next prime is 61949359907. The reversal of 61949359887 is 78895394916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61949359887 - 2² = 61949359883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61949359883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78815587 + ... + 78816372.

It is an arithmetic number, because the mean of its divisors is an integer number (10403709360).

Almost surely, 2^61949359887 is an apocalyptic number.

61949359887 is a deficient number, since it is larger than the sum of its proper divisors (21280314993).

61949359887 is a wasteful number, since it uses less digits than its factorization.

61949359887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157632093.

The product of its digits is 117573120, while the sum is 69.

The spelling of 61949359887 in words is "sixty-one billion, nine hundred forty-nine million, three hundred fifty-nine thousand, eight hundred eighty-seven".