2451988761 has 16 divisors (see below), whose sum is σ = 3612138624. Its totient is φ = 1471610624.

The previous prime is 2451988753. The next prime is 2451988769. The reversal of 2451988761 is 1678891542.

It is an interprime number because it is at equal distance from previous prime (2451988753) and next prime (2451988769).

It is a cyclic number.

It is not a de Polignac number, because 2451988761 - 2³ = 2451988753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2451988769) 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, 1044006 + ... + 1046351.

It is an arithmetic number, because the mean of its divisors is an integer number (225758664).

Almost surely, 2^2451988761 is an apocalyptic number.

It is an amenable number.

2451988761 is a deficient number, since it is larger than the sum of its proper divisors (1160149863).

2451988761 is a wasteful number, since it uses less digits than its factorization.

2451988761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090400.

The product of its digits is 967680, while the sum is 51.

The square root of 2451988761 is about 49517.5601276961. The cubic root of 2451988761 is about 1348.4644196970.

The spelling of 2451988761 in words is "two billion, four hundred fifty-one million, nine hundred eighty-eight thousand, seven hundred sixty-one".