61901836415 has 16 divisors (see below), whose sum is σ = 78740913888. Its totient is φ = 46555600896.

The previous prime is 61901836333. The next prime is 61901836463. The reversal of 61901836415 is 51463810916.

It is a cyclic number.

It is not a de Polignac number, because 61901836415 - 2⁸ = 61901836159 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 337322 + ... + 487431.

It is an arithmetic number, because the mean of its divisors is an integer number (4921307118).

Almost surely, 2^61901836415 is an apocalyptic number.

61901836415 is a deficient number, since it is larger than the sum of its proper divisors (16839077473).

61901836415 is a wasteful number, since it uses less digits than its factorization.

61901836415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825658.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 61901836415 in words is "sixty-one billion, nine hundred one million, eight hundred thirty-six thousand, four hundred fifteen".