61155160156545 has 64 divisors (see below), whose sum is σ = 122124801060864. Its totient is φ = 25442666807040.

The previous prime is 61155160156529. The next prime is 61155160156547. The reversal of 61155160156545 is 54565106155116.

It is not a de Polignac number, because 61155160156545 - 2⁴ = 61155160156529 is a prime.

It is a super-2 number, since 2×61155160156545² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61155160156547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 315412347 + ... + 315606176.

It is an arithmetic number, because the mean of its divisors is an integer number (1908200016576).

Almost surely, 2^{61155160156545} is an apocalyptic number.

61155160156545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61155160156545 is a deficient number, since it is larger than the sum of its proper divisors (60969640904319).

61155160156545 is a wasteful number, since it uses less digits than its factorization.

61155160156545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631018622.

The product of its (nonzero) digits is 2700000, while the sum is 51.

The spelling of 61155160156545 in words is "sixty-one trillion, one hundred fifty-five billion, one hundred sixty million, one hundred fifty-six thousand, five hundred forty-five".