61155160156493 has 6 divisors (see below), whose sum is σ = 66221268098634. Its totient is φ = 56450917067376.

The previous prime is 61155160156463. The next prime is 61155160156511. The reversal of 61155160156493 is 39465106155116.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4556290895209 + 56598869261284 = 2134547^2 + 7523222^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61155160156493 is a prime.

It is a super-2 number, since 2×61155160156493² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155160156463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180932426330 + ... + 180932426667.

It is an arithmetic number, because the mean of its divisors is an integer number (11036878016439).

Almost surely, 2^{61155160156493} is an apocalyptic number.

It is an amenable number.

61155160156493 is a deficient number, since it is larger than the sum of its proper divisors (5066107942141).

61155160156493 is a wasteful number, since it uses less digits than its factorization.

61155160156493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361864853023 (or 361864853010 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 53.

The spelling of 61155160156493 in words is "sixty-one trillion, one hundred fifty-five billion, one hundred sixty million, one hundred fifty-six thousand, four hundred ninety-three".