61396156191 has 8 divisors (see below), whose sum is σ = 81945851904. Its totient is φ = 40888615640.

The previous prime is 61396156189. The next prime is 61396156249. The reversal of 61396156191 is 19165169316.

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 61396156191 - 2¹ = 61396156189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61396156191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61396156091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10535391 + ... + 10541216.

It is an arithmetic number, because the mean of its divisors is an integer number (10243231488).

Almost surely, 2^61396156191 is an apocalyptic number.

61396156191 is a deficient number, since it is larger than the sum of its proper divisors (20549695713).

61396156191 is a wasteful number, since it uses less digits than its factorization.

61396156191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21077581.

The product of its digits is 262440, while the sum is 48.

The spelling of 61396156191 in words is "sixty-one billion, three hundred ninety-six million, one hundred fifty-six thousand, one hundred ninety-one".