61154312660 has 48 divisors (see below), whose sum is σ = 148116904320. Its totient is φ = 20774828160.

The previous prime is 61154312633. The next prime is 61154312671. The reversal of 61154312660 is 6621345116.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 61154312660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1988486 + ... + 2019005.

It is an arithmetic number, because the mean of its divisors is an integer number (3085768840).

Almost surely, 2^61154312660 is an apocalyptic number.

It is an amenable number.

61154312660 is an abundant number, since it is smaller than the sum of its proper divisors (86962591660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61154312660 is a wasteful number, since it uses less digits than its factorization.

61154312660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007616 (or 4007614 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 61154312660 its reverse (6621345116), we get a palindrome (67775657776).

The spelling of 61154312660 in words is "sixty-one billion, one hundred fifty-four million, three hundred twelve thousand, six hundred sixty".