61404310420015 has 8 divisors (see below), whose sum is σ = 74513095791120. Its totient is φ = 48571499477952.

The previous prime is 61404310419997. The next prime is 61404310420073. The reversal of 61404310420015 is 51002401340416.

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

It is a cyclic number.

It is not a de Polignac number, because 61404310420015 - 2¹⁹ = 61404309895727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68993606769 + ... + 68993607658.

It is an arithmetic number, because the mean of its divisors is an integer number (9314136973890).

Almost surely, 2^{61404310420015} is an apocalyptic number.

61404310420015 is a deficient number, since it is larger than the sum of its proper divisors (13108785371105).

61404310420015 is a wasteful number, since it uses less digits than its factorization.

61404310420015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137987214521.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 61404310420015 in words is "sixty-one trillion, four hundred four billion, three hundred ten million, four hundred twenty thousand, fifteen".