61481091 has 16 divisors (see below), whose sum is σ = 96708608. Its totient is φ = 33998400.

The previous prime is 61481083. The next prime is 61481117. The reversal of 61481091 is 19018416.

It is not a de Polignac number, because 61481091 - 2³ = 61481083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61481041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46570 + ... + 47871.

It is an arithmetic number, because the mean of its divisors is an integer number (6044288).

Almost surely, 2^61481091 is an apocalyptic number.

61481091 is a deficient number, since it is larger than the sum of its proper divisors (35227517).

61481091 is a wasteful number, since it uses less digits than its factorization.

61481091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94482.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 61481091 is about 7840.9878841891. The cubic root of 61481091 is about 394.6818802756.

The spelling of 61481091 in words is "sixty-one million, four hundred eighty-one thousand, ninety-one".