61413630231 has 4 divisors (see below), whose sum is σ = 81884840312. Its totient is φ = 40942420152.

The previous prime is 61413630217. The next prime is 61413630241. The reversal of 61413630231 is 13203631416.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61413630231 - 2¹¹ = 61413628183 is a prime.

It is a super-2 number, since 2×61413630231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61413630241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10235605036 + ... + 10235605041.

It is an arithmetic number, because the mean of its divisors is an integer number (20471210078).

Almost surely, 2^61413630231 is an apocalyptic number.

61413630231 is a deficient number, since it is larger than the sum of its proper divisors (20471210081).

61413630231 is a wasteful number, since it uses less digits than its factorization.

61413630231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20471210080.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 61413630231 in words is "sixty-one billion, four hundred thirteen million, six hundred thirty thousand, two hundred thirty-one".