61354962899 has 4 divisors (see below), whose sum is σ = 61410589536. Its totient is φ = 61299336264.

The previous prime is 61354962859. The next prime is 61354962923. The reversal of 61354962899 is 99826945316.

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 61354962899 - 2¹⁶ = 61354897363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61354962859) 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 in 3 ways as a sum of consecutive naturals, for example, 27811664 + ... + 27813869.

It is an arithmetic number, because the mean of its divisors is an integer number (15352647384).

Almost surely, 2^61354962899 is an apocalyptic number.

61354962899 is a deficient number, since it is larger than the sum of its proper divisors (55626637).

61354962899 is a wasteful number, since it uses less digits than its factorization.

61354962899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55626636.

The product of its digits is 25194240, while the sum is 62.

The spelling of 61354962899 in words is "sixty-one billion, three hundred fifty-four million, nine hundred sixty-two thousand, eight hundred ninety-nine".