5121557690 has 8 divisors (see below), whose sum is σ = 9218803860. Its totient is φ = 2048623072.

The previous prime is 5121557689. The next prime is 5121557713. The reversal of 5121557690 is 967551215.

It can be written as a sum of positive squares in 2 ways, for example, as 5104673809 + 16883881 = 71447^2 + 4109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×5121557690² = 52460706343996272200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256077875 + ... + 256077894.

Almost surely, 2^5121557690 is an apocalyptic number.

5121557690 is a deficient number, since it is larger than the sum of its proper divisors (4097246170).

5121557690 is a wasteful number, since it uses less digits than its factorization.

5121557690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512155776.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 5121557690 is about 71565.0591420143. The cubic root of 5121557690 is about 1723.7225229160.

The spelling of 5121557690 in words is "five billion, one hundred twenty-one million, five hundred fifty-seven thousand, six hundred ninety".