61401599 has 16 divisors (see below), whose sum is σ = 72112128. Its totient is φ = 51190272.

The previous prime is 61401589. The next prime is 61401623. The reversal of 61401599 is 99510416.

It is a de Polignac number, because none of the positive numbers 2^k-61401599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61401589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63014 + ... + 63980.

It is an arithmetic number, because the mean of its divisors is an integer number (4507008).

Almost surely, 2^61401599 is an apocalyptic number.

61401599 is a deficient number, since it is larger than the sum of its proper divisors (10710529).

61401599 is a wasteful number, since it uses less digits than its factorization.

61401599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 61401599 is about 7835.9172405022. The cubic root of 61401599 is about 394.5117055496.

The spelling of 61401599 in words is "sixty-one million, four hundred one thousand, five hundred ninety-nine".