61011814440 has 64 divisors (see below), whose sum is σ = 185542804800. Its totient is φ = 16046940672.

The previous prime is 61011814433. The next prime is 61011814469. The reversal of 61011814440 is 4441811016.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61011814398 and 61011814407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3473650 + ... + 3491169.

It is an arithmetic number, because the mean of its divisors is an integer number (2899106325).

Almost surely, 2^61011814440 is an apocalyptic number.

61011814440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61011814440 is an abundant number, since it is smaller than the sum of its proper divisors (124530990360).

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

61011814440 is a wasteful number, since it uses less digits than its factorization.

61011814440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964906 (or 6964902 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The spelling of 61011814440 in words is "sixty-one billion, eleven million, eight hundred fourteen thousand, four hundred forty".