1651161270 has 32 divisors (see below), whose sum is σ = 4323041280. Its totient is φ = 400281440.

The previous prime is 1651161269. The next prime is 1651161287. The reversal of 1651161270 is 721611561.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 2501430 + ... + 2502089.

It is an arithmetic number, because the mean of its divisors is an integer number (135095040).

Almost surely, 2^1651161270 is an apocalyptic number.

1651161270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1651161270 is an abundant number, since it is smaller than the sum of its proper divisors (2671880010).

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

1651161270 is a wasteful number, since it uses less digits than its factorization.

1651161270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003540.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1651161270 is about 40634.4837545649. The cubic root of 1651161270 is about 1181.9429042425.

The spelling of 1651161270 in words is "one billion, six hundred fifty-one million, one hundred sixty-one thousand, two hundred seventy".