61541353011555 has 96 divisors (see below), whose sum is σ = 114506815363200. Its totient is φ = 30464685342720.

The previous prime is 61541353011533. The next prime is 61541353011587. The reversal of 61541353011555 is 55511035314516.

61541353011555 is a `hidden beast` number, since 6 + 1 + 5 + 41 + 3 + 53 + 0 + 1 + 1 + 555 = 666.

It is not a de Polignac number, because 61541353011555 - 2²⁸ = 61541084576099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61541353011555.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 526615771 + ... + 526732619.

It is an arithmetic number, because the mean of its divisors is an integer number (1192779326700).

Almost surely, 2^{61541353011555} is an apocalyptic number.

61541353011555 is a deficient number, since it is larger than the sum of its proper divisors (52965462351645).

61541353011555 is a wasteful number, since it uses less digits than its factorization.

61541353011555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126381 (or 126378 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 61541353011555 in words is "sixty-one trillion, five hundred forty-one billion, three hundred fifty-three million, eleven thousand, five hundred fifty-five".