51198549490 has 16 divisors (see below), whose sum is σ = 100535333760. Its totient is φ = 18617654320.

The previous prime is 51198549473. The next prime is 51198549491. The reversal of 51198549490 is 9494589115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (51198549491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232720570 + ... + 232720789.

It is an arithmetic number, because the mean of its divisors is an integer number (6283458360).

Almost surely, 2^51198549490 is an apocalyptic number.

51198549490 is a deficient number, since it is larger than the sum of its proper divisors (49336784270).

51198549490 is a wasteful number, since it uses less digits than its factorization.

51198549490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465441377.

The product of its (nonzero) digits is 2332800, while the sum is 55.

The spelling of 51198549490 in words is "fifty-one billion, one hundred ninety-eight million, five hundred forty-nine thousand, four hundred ninety".