55719690 has 32 divisors (see below), whose sum is σ = 144014976. Its totient is φ = 13715520.

The previous prime is 55719661. The next prime is 55719691. The reversal of 55719690 is 9691755.

It is a super-2 number, since 2×55719690² = 6209367707392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55719691) 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, 71046 + ... + 71825.

It is an arithmetic number, because the mean of its divisors is an integer number (4500468).

Almost surely, 2^55719690 is an apocalyptic number.

55719690 is an abundant number, since it is smaller than the sum of its proper divisors (88295286).

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

55719690 is a wasteful number, since it uses less digits than its factorization.

55719690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142894.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 55719690 is about 7464.5622778566. The cubic root of 55719690 is about 381.9468187983.

The spelling of 55719690 in words is "fifty-five million, seven hundred nineteen thousand, six hundred ninety".