1400655551 has 12 divisors (see below), whose sum is σ = 1493898840. Its totient is φ = 1312944000.

The previous prime is 1400655523. The next prime is 1400655583. The reversal of 1400655551 is 1555560041.

It is a de Polignac number, because none of the positive numbers 2^k-1400655551 is a prime.

It is a super-2 number, since 2×1400655551² = 3923671945094227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400645551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62885 + ... + 82193.

It is an arithmetic number, because the mean of its divisors is an integer number (124491570).

Almost surely, 2^1400655551 is an apocalyptic number.

1400655551 is a deficient number, since it is larger than the sum of its proper divisors (93243289).

1400655551 is a wasteful number, since it uses less digits than its factorization.

1400655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594 (or 19577 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 1400655551 is about 37425.3330112105. Note that the first 3 decimals coincide. The cubic root of 1400655551 is about 1118.8635238003.

The spelling of 1400655551 in words is "one billion, four hundred million, six hundred fifty-five thousand, five hundred fifty-one".