61140213555 has 32 divisors (see below), whose sum is σ = 100601720064. Its totient is φ = 31693823616.

The previous prime is 61140213553. The next prime is 61140213559. The reversal of 61140213555 is 55531204116.

It is not a de Polignac number, because 61140213555 - 2¹ = 61140213553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61140213551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274309 + ... + 444438.

It is an arithmetic number, because the mean of its divisors is an integer number (3143803752).

Almost surely, 2^61140213555 is an apocalyptic number.

61140213555 is a deficient number, since it is larger than the sum of its proper divisors (39461506509).

61140213555 is a wasteful number, since it uses less digits than its factorization.

61140213555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718915.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 61140213555 in words is "sixty-one billion, one hundred forty million, two hundred thirteen thousand, five hundred fifty-five".