61333436261131 has 4 divisors (see below), whose sum is σ = 62759795243992. Its totient is φ = 59907077278272.

The previous prime is 61333436261107. The next prime is 61333436261137. The reversal of 61333436261131 is 13116263433316.

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

It is a cyclic number.

It is not a de Polignac number, because 61333436261131 - 2⁵ = 61333436261099 is a prime.

It is a super-2 number, since 2×61333436261131² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1426358982817 = 61333436261131 / (6 + 1 + 3 + 3 + 3 + 4 + 3 + 6 + 2 + 6 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61333436261137) 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, 713179491366 + ... + 713179491451.

It is an arithmetic number, because the mean of its divisors is an integer number (15689948810998).

Almost surely, 2^{61333436261131} is an apocalyptic number.

61333436261131 is a deficient number, since it is larger than the sum of its proper divisors (1426358982861).

61333436261131 is a wasteful number, since it uses less digits than its factorization.

61333436261131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426358982860.

The product of its digits is 419904, while the sum is 43.

Adding to 61333436261131 its reverse (13116263433316), we get a palindrome (74449699694447).

The spelling of 61333436261131 in words is "sixty-one trillion, three hundred thirty-three billion, four hundred thirty-six million, two hundred sixty-one thousand, one hundred thirty-one".