61499405 has 16 divisors (see below), whose sum is σ = 81312768. Its totient is φ = 44280000.

The previous prime is 61499393. The next prime is 61499441. The reversal of 61499405 is 50499416.

It is not a de Polignac number, because 61499405 - 2⁶ = 61499341 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 20 + ... + 11090.

It is an arithmetic number, because the mean of its divisors is an integer number (5082048).

Almost surely, 2^61499405 is an apocalyptic number.

It is an amenable number.

61499405 is a deficient number, since it is larger than the sum of its proper divisors (19813363).

61499405 is a wasteful number, since it uses less digits than its factorization.

61499405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 61499405 is about 7842.1556347729. The cubic root of 61499405 is about 394.7210656915.

The spelling of 61499405 in words is "sixty-one million, four hundred ninety-nine thousand, four hundred five".