2520251778 has 16 divisors (see below), whose sum is σ = 5498731296. Its totient is φ = 763712640.

The previous prime is 2520251761. The next prime is 2520251791. The reversal of 2520251778 is 8771520252.

It is a super-2 number, since 2×2520251778² = 12703338049024322568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19092751 + ... + 19092882.

It is an arithmetic number, because the mean of its divisors is an integer number (343670706).

Almost surely, 2^2520251778 is an apocalyptic number.

2520251778 is an abundant number, since it is smaller than the sum of its proper divisors (2978479518).

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

2520251778 is a wasteful number, since it uses less digits than its factorization.

2520251778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38185649.

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 2520251778 is about 50202.1092983153. The cubic root of 2520251778 is about 1360.8637423350.

The spelling of 2520251778 in words is "two billion, five hundred twenty million, two hundred fifty-one thousand, seven hundred seventy-eight".