61401605 has 8 divisors (see below), whose sum is σ = 76885632. Its totient is φ = 46985488.

The previous prime is 61401589. The next prime is 61401623. The reversal of 61401605 is 50610416.

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 61401605 - 2⁴ = 61401589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

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, 266849 + ... + 267078.

It is an arithmetic number, because the mean of its divisors is an integer number (9610704).

Almost surely, 2^61401605 is an apocalyptic number.

It is an amenable number.

61401605 is a deficient number, since it is larger than the sum of its proper divisors (15484027).

61401605 is a wasteful number, since it uses less digits than its factorization.

61401605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533955.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61401605 is about 7835.9176233547. The cubic root of 61401605 is about 394.5117183998.

The spelling of 61401605 in words is "sixty-one million, four hundred one thousand, six hundred five".