651651942 has 16 divisors (see below), whose sum is σ = 1304306352. Its totient is φ = 217050240.

The previous prime is 651651937. The next prime is 651651943. The reversal of 651651942 is 249156156.

It is a self number, because there is not a number n which added to its sum of digits gives 651651942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651651943) 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, 33183 + ... + 49034.

It is an arithmetic number, because the mean of its divisors is an integer number (81519147).

Almost surely, 2^651651942 is an apocalyptic number.

651651942 is an abundant number, since it is smaller than the sum of its proper divisors (652654410).

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

651651942 is a wasteful number, since it uses less digits than its factorization.

651651942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83543.

The product of its digits is 64800, while the sum is 39.

The square root of 651651942 is about 25527.4742581400. The cubic root of 651651942 is about 866.9723187857.

The spelling of 651651942 in words is "six hundred fifty-one million, six hundred fifty-one thousand, nine hundred forty-two".