61572396311 has 4 divisors (see below), whose sum is σ = 61610856624. Its totient is φ = 61533936000.

The previous prime is 61572396287. The next prime is 61572396317. The reversal of 61572396311 is 11369327516.

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 61572396311 - 2¹⁸ = 61572134167 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 (61572396317) 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, 19227755 + ... + 19230956.

It is an arithmetic number, because the mean of its divisors is an integer number (15402714156).

Almost surely, 2^61572396311 is an apocalyptic number.

61572396311 is a deficient number, since it is larger than the sum of its proper divisors (38460313).

61572396311 is a wasteful number, since it uses less digits than its factorization.

61572396311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38460312.

The product of its digits is 204120, while the sum is 44.

The spelling of 61572396311 in words is "sixty-one billion, five hundred seventy-two million, three hundred ninety-six thousand, three hundred eleven".